./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a135e953d64ed0fec81eb2a1e42f4031e3e387fc71d5a5cd2177772a202dc706 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:52:15,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:52:15,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:52:15,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:52:15,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:52:15,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:52:15,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:52:15,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:52:15,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:52:15,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:52:15,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:52:15,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:52:15,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:52:15,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:52:15,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:52:15,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:52:15,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:52:15,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:52:15,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:52:15,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:52:15,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:52:15,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:52:15,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:52:15,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:52:15,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:52:15,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:52:15,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:52:15,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:52:15,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:52:15,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:52:15,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:52:15,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:52:15,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:52:15,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:52:15,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:52:15,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:52:15,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:52:15,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:52:15,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:52:15,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:52:15,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:52:15,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:52:15,151 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:52:15,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:52:15,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:52:15,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:52:15,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:52:15,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:52:15,153 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:52:15,153 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:52:15,154 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:52:15,155 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:52:15,155 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:52:15,155 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:52:15,155 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:52:15,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:52:15,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:52:15,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:52:15,157 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:52:15,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:52:15,157 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:52:15,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:52:15,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:52:15,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:52:15,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:52:15,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:52:15,158 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:52:15,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:52:15,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:52:15,159 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:52:15,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:52:15,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:52:15,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:52:15,159 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_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a135e953d64ed0fec81eb2a1e42f4031e3e387fc71d5a5cd2177772a202dc706 [2022-12-14 06:52:15,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:52:15,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:52:15,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:52:15,372 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:52:15,372 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:52:15,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-properties/list-2.i [2022-12-14 06:52:17,972 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:52:18,174 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:52:18,175 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/sv-benchmarks/c/list-properties/list-2.i [2022-12-14 06:52:18,185 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/data/72e6687c4/7eb39cfcd0a2491c8d67806f3bc36c13/FLAG03d1e0129 [2022-12-14 06:52:18,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/data/72e6687c4/7eb39cfcd0a2491c8d67806f3bc36c13 [2022-12-14 06:52:18,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:52:18,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:52:18,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:52:18,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:52:18,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:52:18,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae0b6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18, skipping insertion in model container [2022-12-14 06:52:18,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:52:18,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:52:18,461 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2022-12-14 06:52:18,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:52:18,475 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:52:18,510 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/sv-benchmarks/c/list-properties/list-2.i[23408,23421] [2022-12-14 06:52:18,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:52:18,533 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:52:18,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18 WrapperNode [2022-12-14 06:52:18,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:52:18,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:52:18,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:52:18,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:52:18,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,568 INFO L138 Inliner]: procedures = 124, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2022-12-14 06:52:18,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:52:18,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:52:18,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:52:18,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:52:18,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:52:18,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:52:18,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:52:18,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:52:18,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (1/1) ... [2022-12-14 06:52:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:52:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:18,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:52:18,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:52:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-12-14 06:52:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 06:52:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 06:52:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:52:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:52:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:52:18,752 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:52:18,754 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:52:18,778 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-12-14 06:52:18,884 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:52:18,900 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:52:18,900 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 06:52:18,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:52:18 BoogieIcfgContainer [2022-12-14 06:52:18,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:52:18,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:52:18,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:52:18,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:52:18,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:52:18" (1/3) ... [2022-12-14 06:52:18,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196796ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:52:18, skipping insertion in model container [2022-12-14 06:52:18,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:52:18" (2/3) ... [2022-12-14 06:52:18,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196796ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:52:18, skipping insertion in model container [2022-12-14 06:52:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:52:18" (3/3) ... [2022-12-14 06:52:18,911 INFO L112 eAbstractionObserver]: Analyzing ICFG list-2.i [2022-12-14 06:52:18,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:52:18,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:52:18,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:52:18,969 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;@41c355b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:52:18,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:52:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:52:18,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:18,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:18,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1831991699, now seen corresponding path program 1 times [2022-12-14 06:52:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:18,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191289072] [2022-12-14 06:52:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:19,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:19,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191289072] [2022-12-14 06:52:19,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191289072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:19,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:52:19,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:52:19,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136751187] [2022-12-14 06:52:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:52:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:19,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:52:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:52:19,182 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:19,207 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2022-12-14 06:52:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:52:19,210 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-12-14 06:52:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:19,216 INFO L225 Difference]: With dead ends: 45 [2022-12-14 06:52:19,217 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:52:19,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:52:19,223 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:19,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:52:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:52:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 06:52:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 06:52:19,248 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2022-12-14 06:52:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:19,248 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 06:52:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 06:52:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:52:19,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:19,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:52:19,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1175607717, now seen corresponding path program 1 times [2022-12-14 06:52:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:19,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577601788] [2022-12-14 06:52:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:19,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:19,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577601788] [2022-12-14 06:52:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577601788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:19,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:52:19,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:52:19,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473180640] [2022-12-14 06:52:19,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:52:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:52:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:52:19,622 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:19,720 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-14 06:52:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:52:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 06:52:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:19,722 INFO L225 Difference]: With dead ends: 45 [2022-12-14 06:52:19,723 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 06:52:19,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:52:19,724 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:19,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 46 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 06:52:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-12-14 06:52:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2022-12-14 06:52:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-12-14 06:52:19,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2022-12-14 06:52:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:19,733 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-12-14 06:52:19,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:19,733 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-12-14 06:52:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:52:19,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:19,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:52:19,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash 231293632, now seen corresponding path program 1 times [2022-12-14 06:52:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:19,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073644476] [2022-12-14 06:52:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:19,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073644476] [2022-12-14 06:52:19,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073644476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:19,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:52:19,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:52:19,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174880405] [2022-12-14 06:52:19,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:19,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:52:19,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:19,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:52:19,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:52:19,955 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:20,035 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-12-14 06:52:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:52:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:52:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:20,037 INFO L225 Difference]: With dead ends: 47 [2022-12-14 06:52:20,037 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 06:52:20,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:52:20,038 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:20,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 50 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 06:52:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2022-12-14 06:52:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 06:52:20,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2022-12-14 06:52:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:20,044 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 06:52:20,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 06:52:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:52:20,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:20,045 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:20,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:52:20,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1255996608, now seen corresponding path program 1 times [2022-12-14 06:52:20,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158439820] [2022-12-14 06:52:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:20,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:20,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:20,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158439820] [2022-12-14 06:52:20,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158439820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:52:20,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:52:20,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:52:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449481030] [2022-12-14 06:52:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:52:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:52:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:52:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:52:20,172 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:20,239 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-12-14 06:52:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:52:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:52:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:20,240 INFO L225 Difference]: With dead ends: 47 [2022-12-14 06:52:20,240 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 06:52:20,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:52:20,241 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:20,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:52:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 06:52:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2022-12-14 06:52:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 06:52:20,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2022-12-14 06:52:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:20,246 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 06:52:20,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 06:52:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:52:20,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:20,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:52:20,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash -423740148, now seen corresponding path program 1 times [2022-12-14 06:52:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:20,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098133918] [2022-12-14 06:52:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:20,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:20,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:20,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098133918] [2022-12-14 06:52:20,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098133918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:20,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192435369] [2022-12-14 06:52:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:20,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:20,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:20,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:52:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:52:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:20,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:20,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:20,852 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:20,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 06:52:20,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 06:52:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 06:52:20,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:20,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:21,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:21,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-12-14 06:52:21,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:21,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 06:52:21,072 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2022-12-14 06:52:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:21,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192435369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834317512] [2022-12-14 06:52:21,208 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:21,209 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:21,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:21,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:21,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:21,275 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:21,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:21,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:52:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:21,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:21,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:21,393 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:21,394 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:21,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:21,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 06:52:21,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:21,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:21,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:21,561 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:21,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:21,659 INFO L321 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2022-12-14 06:52:21,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 248 treesize of output 276 [2022-12-14 06:52:21,694 INFO L321 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2022-12-14 06:52:21,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 250 [2022-12-14 06:52:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:21,740 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:21,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 245 [2022-12-14 06:52:21,766 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:21,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 226 [2022-12-14 06:52:21,996 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:21,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 249 [2022-12-14 06:52:22,026 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:22,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 237 [2022-12-14 06:52:22,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:22,076 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:22,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 241 treesize of output 226 [2022-12-14 06:52:22,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:22,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:22,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:22,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:22,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:22,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:22,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:22,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:22,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:22,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:22,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:22,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:22,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:22,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:22,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:23,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '542#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~p~0#1.base_29| Int)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_29|) |v_ULTIMATE.start_main_~p~0#1.offset_27|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:23,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:23,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:23,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 06:52:23,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239938099] [2022-12-14 06:52:23,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:23,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 06:52:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 06:52:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=647, Unknown=4, NotChecked=0, Total=756 [2022-12-14 06:52:23,383 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:23,672 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-12-14 06:52:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:52:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 06:52:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:23,673 INFO L225 Difference]: With dead ends: 49 [2022-12-14 06:52:23,673 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 06:52:23,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=899, Unknown=5, NotChecked=0, Total=1056 [2022-12-14 06:52:23,674 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:23,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 82 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 06:52:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2022-12-14 06:52:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-14 06:52:23,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 19 [2022-12-14 06:52:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:23,677 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-14 06:52:23,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-14 06:52:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:52:23,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:23,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:23,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:52:23,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:23,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash 439661516, now seen corresponding path program 1 times [2022-12-14 06:52:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:23,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069524226] [2022-12-14 06:52:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:24,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:24,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069524226] [2022-12-14 06:52:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069524226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326599542] [2022-12-14 06:52:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:24,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:24,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:24,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:52:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 06:52:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:24,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:24,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:24,227 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:24,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 06:52:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:24,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 06:52:24,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 06:52:24,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:24,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:24,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-12-14 06:52:24,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:24,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 06:52:24,421 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2022-12-14 06:52:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:24,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326599542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:24,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893483931] [2022-12-14 06:52:24,480 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:24,481 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:24,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:24,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:24,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:24,506 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 06:52:24,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 06:52:24,531 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:24,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:24,586 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:24,586 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:24,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:24,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 06:52:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:24,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:24,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:24,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:24,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:24,707 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:24,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:24,731 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:24,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:24,777 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:24,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 249 [2022-12-14 06:52:24,831 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-12-14 06:52:24,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 239 treesize of output 248 [2022-12-14 06:52:24,903 INFO L321 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-12-14 06:52:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 242 treesize of output 262 [2022-12-14 06:52:25,063 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:25,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 249 [2022-12-14 06:52:25,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:25,107 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:25,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 253 treesize of output 238 [2022-12-14 06:52:25,132 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:25,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 237 [2022-12-14 06:52:25,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:25,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:25,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:25,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:25,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:25,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:25,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:25,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:25,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:25,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:25,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:25,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:25,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:26,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_34| Int) (|v_ULTIMATE.start_main_~p~0#1.base_38| Int)) (= 3 (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_38|) |v_ULTIMATE.start_main_~p~0#1.offset_34|))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:26,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:26,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:26,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2022-12-14 06:52:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831637925] [2022-12-14 06:52:26,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:26,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:52:26,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:52:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=968, Unknown=3, NotChecked=0, Total=1122 [2022-12-14 06:52:26,250 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:26,686 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 06:52:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:52:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 06:52:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:26,687 INFO L225 Difference]: With dead ends: 43 [2022-12-14 06:52:26,687 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 06:52:26,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=1261, Unknown=3, NotChecked=0, Total=1482 [2022-12-14 06:52:26,688 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:26,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 156 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:52:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 06:52:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-12-14 06:52:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-12-14 06:52:26,691 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 19 [2022-12-14 06:52:26,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:26,692 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-12-14 06:52:26,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-12-14 06:52:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:52:26,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:26,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:26,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:52:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:26,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1880990311, now seen corresponding path program 1 times [2022-12-14 06:52:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:26,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600747009] [2022-12-14 06:52:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:27,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600747009] [2022-12-14 06:52:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600747009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277637944] [2022-12-14 06:52:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:27,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:27,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:27,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:52:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 06:52:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:27,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:27,199 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:27,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 06:52:27,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:27,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:27,270 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 06:52:27,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-12-14 06:52:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 06:52:27,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:27,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 06:52:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 06:52:27,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:27,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:27,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 57 [2022-12-14 06:52:27,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-12-14 06:52:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:27,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277637944] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:27,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972249950] [2022-12-14 06:52:27,444 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:27,445 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:27,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:27,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:27,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:27,470 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 06:52:27,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 06:52:27,495 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:27,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:27,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:27,545 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-12-14 06:52:27,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 06:52:27,578 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:27,579 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:27,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:27,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:27,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:27,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:27,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:27,688 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:27,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:27,722 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:27,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 249 [2022-12-14 06:52:27,783 INFO L321 Elim1Store]: treesize reduction 120, result has 27.3 percent of original size [2022-12-14 06:52:27,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 244 treesize of output 272 [2022-12-14 06:52:27,813 INFO L321 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2022-12-14 06:52:27,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 246 [2022-12-14 06:52:27,836 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:27,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 226 [2022-12-14 06:52:28,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:28,138 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:28,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 395 treesize of output 372 [2022-12-14 06:52:28,164 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:28,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 382 treesize of output 337 [2022-12-14 06:52:28,182 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:28,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 325 [2022-12-14 06:52:28,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:28,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:28,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:28,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:28,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:28,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:28,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:28,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:28,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:28,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:28,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:28,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:28,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:29,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1051#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:29,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:29,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:29,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-14 06:52:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026033172] [2022-12-14 06:52:29,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:29,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:52:29,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:52:29,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-12-14 06:52:29,096 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:29,300 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-12-14 06:52:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:52:29,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 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 21 [2022-12-14 06:52:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:29,301 INFO L225 Difference]: With dead ends: 67 [2022-12-14 06:52:29,301 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 06:52:29,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:52:29,302 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:29,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 104 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:52:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 06:52:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-12-14 06:52:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-12-14 06:52:29,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 21 [2022-12-14 06:52:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:29,307 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-12-14 06:52:29,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-12-14 06:52:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:52:29,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:29,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:29,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:52:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:29,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -500866302, now seen corresponding path program 1 times [2022-12-14 06:52:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859852565] [2022-12-14 06:52:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:29,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:29,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859852565] [2022-12-14 06:52:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859852565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:29,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896376690] [2022-12-14 06:52:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:29,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:29,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:29,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:29,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:52:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 06:52:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:29,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:29,838 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:29,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 06:52:29,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:29,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:29,912 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 06:52:29,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-12-14 06:52:29,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 06:52:29,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 06:52:29,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 06:52:29,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 06:52:29,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:29,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:29,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-12-14 06:52:29,999 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_240 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_240) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (forall ((v_ArrVal_242 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_242) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)))) is different from false [2022-12-14 06:52:30,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:30,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-14 06:52:30,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:30,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-12-14 06:52:30,023 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-12-14 06:52:30,036 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 06:52:30,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-12-14 06:52:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:52:30,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896376690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:30,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007997330] [2022-12-14 06:52:30,128 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:30,129 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:30,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:30,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:30,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:30,154 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 06:52:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 06:52:30,177 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:30,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:30,229 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:30,229 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:30,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 06:52:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:30,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:30,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:30,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,328 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:30,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:30,374 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-12-14 06:52:30,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 243 treesize of output 252 [2022-12-14 06:52:30,444 INFO L321 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-12-14 06:52:30,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 246 treesize of output 266 [2022-12-14 06:52:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,485 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:30,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 245 [2022-12-14 06:52:30,508 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:30,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 226 [2022-12-14 06:52:30,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:30,720 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:30,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 307 treesize of output 292 [2022-12-14 06:52:30,744 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:30,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 249 [2022-12-14 06:52:30,769 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:30,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 237 [2022-12-14 06:52:30,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:30,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:30,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:30,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:30,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:30,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:30,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:30,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:30,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:30,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:30,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:31,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:31,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1378#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:31,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:31,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:31,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-14 06:52:31,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721633459] [2022-12-14 06:52:31,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:31,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:52:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:52:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=757, Unknown=1, NotChecked=56, Total=930 [2022-12-14 06:52:31,676 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:32,002 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-12-14 06:52:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:52:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 06:52:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:32,003 INFO L225 Difference]: With dead ends: 69 [2022-12-14 06:52:32,003 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 06:52:32,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1209, Unknown=1, NotChecked=72, Total=1482 [2022-12-14 06:52:32,004 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:32,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 138 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 215 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-12-14 06:52:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 06:52:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2022-12-14 06:52:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-12-14 06:52:32,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 23 [2022-12-14 06:52:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:32,009 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-12-14 06:52:32,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-12-14 06:52:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:52:32,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:32,009 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:32,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:52:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 06:52:32,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash 523836674, now seen corresponding path program 2 times [2022-12-14 06:52:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:32,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242182205] [2022-12-14 06:52:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:32,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:32,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242182205] [2022-12-14 06:52:32,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242182205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:32,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411194815] [2022-12-14 06:52:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:52:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:32,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:32,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:52:32,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:52:32,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:52:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 06:52:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:32,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:32,515 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:32,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 06:52:32,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:32,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:32,581 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 06:52:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-12-14 06:52:32,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 06:52:32,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 06:52:32,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 06:52:32,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 06:52:32,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:32,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:32,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-12-14 06:52:32,658 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_293 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_293) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (forall ((v_ArrVal_295 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_295) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)))) is different from false [2022-12-14 06:52:32,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:32,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-12-14 06:52:32,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:32,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-12-14 06:52:32,681 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-12-14 06:52:32,693 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 06:52:32,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-12-14 06:52:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:52:32,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411194815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:32,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126202974] [2022-12-14 06:52:32,794 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:32,794 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:32,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:32,794 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:32,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:32,820 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 06:52:32,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-12-14 06:52:32,845 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:32,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:32,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:32,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:32,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:32,910 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:32,910 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:32,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 06:52:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:32,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:32,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:32,993 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:32,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:33,035 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-12-14 06:52:33,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 243 treesize of output 252 [2022-12-14 06:52:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:33,067 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:33,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 247 [2022-12-14 06:52:33,119 INFO L321 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-12-14 06:52:33,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 242 treesize of output 262 [2022-12-14 06:52:33,138 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:33,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 226 [2022-12-14 06:52:33,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:33,393 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:33,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 307 treesize of output 292 [2022-12-14 06:52:33,415 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:33,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 249 [2022-12-14 06:52:33,433 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:33,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 237 [2022-12-14 06:52:33,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:33,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:33,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:33,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:33,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:33,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:33,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:33,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:33,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:33,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:33,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:33,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:33,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:33,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:34,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1708#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:34,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:34,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:34,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-14 06:52:34,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495880772] [2022-12-14 06:52:34,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:34,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:52:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:52:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=761, Unknown=1, NotChecked=56, Total=930 [2022-12-14 06:52:34,280 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:34,571 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-12-14 06:52:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:52:34,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 06:52:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:34,571 INFO L225 Difference]: With dead ends: 64 [2022-12-14 06:52:34,572 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 06:52:34,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1213, Unknown=1, NotChecked=72, Total=1482 [2022-12-14 06:52:34,573 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 138 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 206 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-12-14 06:52:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 06:52:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-12-14 06:52:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-14 06:52:34,579 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 23 [2022-12-14 06:52:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:34,579 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-14 06:52:34,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-14 06:52:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 06:52:34,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:34,580 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:34,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:52:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 06:52:34,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash 330636430, now seen corresponding path program 3 times [2022-12-14 06:52:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:34,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974730118] [2022-12-14 06:52:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:52:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:35,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:52:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974730118] [2022-12-14 06:52:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974730118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:52:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099080473] [2022-12-14 06:52:35,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:52:35,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:52:35,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:52:35,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:52:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:52:35,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:52:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:52:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 06:52:35,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:52:35,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:35,371 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 06:52:35,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 06:52:35,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:35,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:35,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:52:35,512 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 06:52:35,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-12-14 06:52:35,523 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-12-14 06:52:35,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 06:52:35,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:35,618 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 06:52:35,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 117 [2022-12-14 06:52:35,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:35,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-12-14 06:52:35,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 112 [2022-12-14 06:52:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:35,769 INFO L321 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2022-12-14 06:52:35,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 106 [2022-12-14 06:52:35,789 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-12-14 06:52:35,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 192 treesize of output 128 [2022-12-14 06:52:35,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 06:52:35,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:35,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:35,864 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 06:52:35,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 33 [2022-12-14 06:52:35,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:35,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-12-14 06:52:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 06:52:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:52:35,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:52:38,006 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_379 Int) (v_ArrVal_385 Int) (v_ArrVal_384 Int) (|v_ULTIMATE.start_main_~p~0#1.offset_91| Int) (v_ArrVal_383 Int) (v_ArrVal_386 (Array Int Int))) (or (= 2 (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 v_ArrVal_383)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_386) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 |c_ULTIMATE.start_main_~t~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_91| v_ArrVal_384))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)) (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 v_ArrVal_379)))) (store .cse3 |c_ULTIMATE.start_main_~t~0#1.base| (store (select .cse3 |c_ULTIMATE.start_main_~t~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_91| v_ArrVal_385))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2)))) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_91| v_ArrVal_379)) (not (<= v_ArrVal_379 |c_ULTIMATE.start_main_~t~0#1.offset|)))) is different from false [2022-12-14 06:52:38,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 82 [2022-12-14 06:52:38,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 99 [2022-12-14 06:52:38,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 201 [2022-12-14 06:52:38,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 145 [2022-12-14 06:52:38,076 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 39 [2022-12-14 06:52:38,116 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2022-12-14 06:52:38,124 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2022-12-14 06:52:38,137 INFO L350 Elim1Store]: Elim1 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 42 treesize of output 30 [2022-12-14 06:52:38,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-12-14 06:52:38,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 170 [2022-12-14 06:52:38,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 165 [2022-12-14 06:52:38,398 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-12-14 06:52:38,435 INFO L350 Elim1Store]: Elim1 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 88 treesize of output 80 [2022-12-14 06:52:38,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 102 [2022-12-14 06:52:38,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 172 [2022-12-14 06:52:38,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 06:52:38,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 361 treesize of output 361 [2022-12-14 06:52:38,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 393 treesize of output 265 [2022-12-14 06:52:39,054 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-12-14 06:52:39,077 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-12-14 06:52:39,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-12-14 06:52:39,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2022-12-14 06:52:39,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2022-12-14 06:52:39,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:39,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 202 [2022-12-14 06:52:39,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 160 [2022-12-14 06:52:39,246 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-12-14 06:52:39,376 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 4 [2022-12-14 06:52:39,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:52:39,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:52:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:52:39,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099080473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:52:39,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14277326] [2022-12-14 06:52:39,641 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 06:52:39,641 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:52:39,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:52:39,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:52:39,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:52:39,664 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 06:52:39,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 06:52:39,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 06:52:39,718 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 06:52:39,718 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 06:52:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:39,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 06:52:39,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:39,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 06:52:39,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:52:39,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 06:52:39,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:39,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:39,817 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 234 [2022-12-14 06:52:39,864 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-12-14 06:52:39,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 243 treesize of output 252 [2022-12-14 06:52:39,929 INFO L321 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-12-14 06:52:39,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 246 treesize of output 266 [2022-12-14 06:52:39,947 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 06:52:39,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 230 [2022-12-14 06:52:39,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:39,978 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-12-14 06:52:39,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 245 [2022-12-14 06:52:40,350 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:40,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 648 treesize of output 549 [2022-12-14 06:52:40,378 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 06:52:40,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 540 treesize of output 525 [2022-12-14 06:52:40,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:52:40,413 INFO L321 Elim1Store]: treesize reduction 146, result has 13.1 percent of original size [2022-12-14 06:52:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 529 treesize of output 490 [2022-12-14 06:52:40,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:40,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:40,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:40,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:40,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:40,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:40,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:52:40,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 06:52:40,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:40,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 06:52:40,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-12-14 06:52:40,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 06:52:40,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 06:52:40,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:52:41,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2044#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:52:41,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:52:41,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:52:41,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-12-14 06:52:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567785258] [2022-12-14 06:52:41,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:52:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:52:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:52:41,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:52:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1057, Unknown=5, NotChecked=66, Total=1260 [2022-12-14 06:52:41,548 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:52:42,252 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-12-14 06:52:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:52:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 06:52:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:52:42,253 INFO L225 Difference]: With dead ends: 81 [2022-12-14 06:52:42,253 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 06:52:42,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=209, Invalid=1596, Unknown=5, NotChecked=82, Total=1892 [2022-12-14 06:52:42,255 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:52:42,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 183 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 343 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-12-14 06:52:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 06:52:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2022-12-14 06:52:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-12-14 06:52:42,265 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 25 [2022-12-14 06:52:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:52:42,265 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-12-14 06:52:42,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:52:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-12-14 06:52:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 06:52:42,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:52:42,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:42,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:52:42,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:52:42,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:52:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:52:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash -443299506, now seen corresponding path program 1 times [2022-12-14 06:52:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:52:42,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147566210] [2022-12-14 06:52:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:52:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:52:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 06:52:42,487 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 06:52:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 06:52:42,518 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 06:52:42,519 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 06:52:42,520 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 06:52:42,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:52:42,524 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:52:42,527 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 06:52:42,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 06:52:42 BoogieIcfgContainer [2022-12-14 06:52:42,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 06:52:42,551 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 06:52:42,551 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 06:52:42,551 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 06:52:42,551 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:52:18" (3/4) ... [2022-12-14 06:52:42,553 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 06:52:42,578 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 06:52:42,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 06:52:42,578 INFO L158 Benchmark]: Toolchain (without parser) took 24377.80ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 109.0MB in the beginning and 117.5MB in the end (delta: -8.5MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2022-12-14 06:52:42,579 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:52:42,579 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.95ms. Allocated memory is still 142.6MB. Free memory was 109.0MB in the beginning and 92.3MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 06:52:42,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.81ms. Allocated memory is still 142.6MB. Free memory was 92.3MB in the beginning and 90.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:52:42,579 INFO L158 Benchmark]: Boogie Preprocessor took 26.13ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 89.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:52:42,580 INFO L158 Benchmark]: RCFGBuilder took 306.99ms. Allocated memory is still 142.6MB. Free memory was 89.0MB in the beginning and 75.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:52:42,580 INFO L158 Benchmark]: TraceAbstraction took 23645.67ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 74.3MB in the beginning and 119.6MB in the end (delta: -45.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:52:42,580 INFO L158 Benchmark]: Witness Printer took 27.10ms. Allocated memory is still 172.0MB. Free memory was 119.6MB in the beginning and 117.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:52:42,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.95ms. Allocated memory is still 142.6MB. Free memory was 109.0MB in the beginning and 92.3MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.81ms. Allocated memory is still 142.6MB. Free memory was 92.3MB in the beginning and 90.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.13ms. Allocated memory is still 142.6MB. Free memory was 90.2MB in the beginning and 89.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 306.99ms. Allocated memory is still 142.6MB. Free memory was 89.0MB in the beginning and 75.1MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 23645.67ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 74.3MB in the beginning and 119.6MB in the end (delta: -45.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 27.10ms. Allocated memory is still 172.0MB. Free memory was 119.6MB in the beginning and 117.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) VAL [a={-1:0}, p={-1:0}, t={-2:0}] [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) VAL [a={-1:0}, p={-2:0}, t={-3:0}] [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a VAL [a={-1:0}, p={-1:0}, t={-3:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h VAL [a={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L556] COND TRUE p->h != 3 [L557] reach_error() VAL [a={-1:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.6s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 698 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 967 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 131 IncrementalHoareTripleChecker+Unchecked, 818 mSDsCounter, 162 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1515 IncrementalHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 162 mSolverCounterUnsat, 149 mSDtfsCounter, 1515 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 494 GetRequests, 251 SyntacticMatches, 11 SemanticMatches, 232 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=10, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 95 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 428 ConstructedInterpolants, 60 QuantifiedInterpolants, 7039 SizeOfPredicates, 65 NumberOfNonLiveVariables, 788 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 22/100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 06:52:42,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca205dd7-fcc3-4d1b-a7fd-d6c6e3018367/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE