./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V --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 c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:14:48,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:14:48,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:14:48,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:14:48,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:14:48,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:14:48,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:14:48,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:14:48,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:14:48,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:14:48,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:14:48,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:14:48,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:14:48,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:14:48,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:14:48,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:14:48,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:14:48,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:14:48,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:14:48,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:14:48,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:14:48,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:14:48,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:14:48,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:14:48,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:14:48,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:14:48,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:14:48,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:14:48,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:14:48,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:14:48,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:14:48,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:14:48,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:14:48,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:14:48,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:14:48,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:14:48,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:14:48,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:14:48,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:14:48,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:14:48,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:14:48,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:14:48,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:14:48,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:14:48,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:14:48,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:14:48,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:14:48,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:14:48,252 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:14:48,252 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:14:48,252 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:14:48,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:14:48,254 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:14:48,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:14:48,255 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:14:48,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:14:48,255 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:14:48,256 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:14:48,256 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:14:48,256 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:14:48,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:14:48,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:14:48,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:14:48,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:14:48,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:14:48,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:14:48,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:14:48,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:14:48,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:14:48,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:14:48,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:14:48,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:14:48,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:14:48,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:14:48,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:48,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:14:48,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:14:48,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:14:48,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:14:48,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:14:48,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:14:48,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:14:48,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:14:48,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6dc18f387244e600c9c46c5a67fb3c0c9875a9a14eb13d3a621343f4a214b0b [2021-11-23 02:14:48,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:14:48,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:14:48,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:14:48,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:14:48,662 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:14:48,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-tiling/pnr5.c [2021-11-23 02:14:48,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/data/b67a89df4/e780ce9628444550a7265acb04088a3f/FLAGd04f31d9a [2021-11-23 02:14:49,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:14:49,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/sv-benchmarks/c/array-tiling/pnr5.c [2021-11-23 02:14:49,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/data/b67a89df4/e780ce9628444550a7265acb04088a3f/FLAGd04f31d9a [2021-11-23 02:14:49,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/data/b67a89df4/e780ce9628444550a7265acb04088a3f [2021-11-23 02:14:49,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:14:49,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:14:49,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:49,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:14:49,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:14:49,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:49" (1/1) ... [2021-11-23 02:14:49,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f8f2819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:49, skipping insertion in model container [2021-11-23 02:14:49,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:14:49" (1/1) ... [2021-11-23 02:14:49,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:14:49,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:14:49,921 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-11-23 02:14:49,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:49,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:14:49,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/sv-benchmarks/c/array-tiling/pnr5.c[395,408] [2021-11-23 02:14:49,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:14:50,005 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:14:50,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50 WrapperNode [2021-11-23 02:14:50,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:14:50,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:50,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:14:50,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:14:50,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,057 INFO L137 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2021-11-23 02:14:50,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:14:50,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:14:50,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:14:50,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:14:50,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:14:50,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:14:50,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:14:50,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:14:50,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (1/1) ... [2021-11-23 02:14:50,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:14:50,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:50,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:14:50,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:14:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:14:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:14:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:14:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-11-23 02:14:50,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-11-23 02:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:14:50,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:14:50,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:14:50,284 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:14:50,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:14:50,614 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:14:50,745 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:14:50,745 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:14:50,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:50 BoogieIcfgContainer [2021-11-23 02:14:50,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:14:50,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:14:50,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:14:50,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:14:50,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:14:49" (1/3) ... [2021-11-23 02:14:50,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:50, skipping insertion in model container [2021-11-23 02:14:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:14:50" (2/3) ... [2021-11-23 02:14:50,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:50, skipping insertion in model container [2021-11-23 02:14:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:50" (3/3) ... [2021-11-23 02:14:50,762 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr5.c [2021-11-23 02:14:50,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:14:50,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:14:50,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:14:50,866 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:14:50,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:14:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:14:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:14:50,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:50,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:50,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 155147122, now seen corresponding path program 1 times [2021-11-23 02:14:50,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:50,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383777304] [2021-11-23 02:14:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:51,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383777304] [2021-11-23 02:14:51,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383777304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:51,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:51,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:14:51,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722368182] [2021-11-23 02:14:51,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:51,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:51,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:51,489 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:51,640 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-23 02:14:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:14:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:14:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:51,653 INFO L225 Difference]: With dead ends: 46 [2021-11-23 02:14:51,653 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 02:14:51,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:51,661 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:51,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 02:14:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-23 02:14:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:14:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-23 02:14:51,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 7 [2021-11-23 02:14:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-23 02:14:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:14:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-23 02:14:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:14:51,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:51,718 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:51,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:14:51,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1424526209, now seen corresponding path program 1 times [2021-11-23 02:14:51,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:51,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499890345] [2021-11-23 02:14:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:51,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:14:52,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:52,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499890345] [2021-11-23 02:14:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499890345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330990078] [2021-11-23 02:14:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:52,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:52,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:52,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:14:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:14:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:14:53,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:14:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 69 [2021-11-23 02:14:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:14:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-11-23 02:14:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:53,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 97 [2021-11-23 02:14:53,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:14:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 36 [2021-11-23 02:14:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:53,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 125 [2021-11-23 02:14:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 44 [2021-11-23 02:14:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:53,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 48 [2021-11-23 02:14:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:54,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 122 [2021-11-23 02:14:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 42 [2021-11-23 02:14:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:54,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 50 [2021-11-23 02:14:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:14:54,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:54,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:54,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2021-11-23 02:14:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:14:55,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:14:55,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:14:55,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-23 02:14:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:14:55,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330990078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948958310] [2021-11-23 02:14:55,147 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:14:55,148 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:55,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:55,170 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:55,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:55,340 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:14:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:14:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:14:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:14:55,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 54 [2021-11-23 02:14:55,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-23 02:14:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:56,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:56,312 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:14:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:14:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:56,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:56,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:56,636 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:14:56,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 533 [2021-11-23 02:14:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:14:57,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:14:57,022 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:14:57,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 561 [2021-11-23 02:15:01,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:01,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:15:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:15:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:01,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:15:02,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:02,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 173 [2021-11-23 02:15:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:02,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 118 [2021-11-23 02:15:03,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:03,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:04,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:04,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:04,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:07,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:07,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:07,577 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:15:07,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:09,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '309#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:09,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:09,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:09,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 7] total 21 [2021-11-23 02:15:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986676314] [2021-11-23 02:15:09,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:15:09,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:15:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:15:09,725 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-23 02:15:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:10,889 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-11-23 02:15:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:15:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 28 [2021-11-23 02:15:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:10,893 INFO L225 Difference]: With dead ends: 55 [2021-11-23 02:15:10,893 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 02:15:10,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:15:10,897 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 116 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:15:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 02:15:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2021-11-23 02:15:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:15:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-23 02:15:10,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 28 [2021-11-23 02:15:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:10,912 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-23 02:15:10,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-23 02:15:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-23 02:15:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:15:10,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:10,915 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:10,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:11,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:11,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1906273384, now seen corresponding path program 1 times [2021-11-23 02:15:11,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964385298] [2021-11-23 02:15:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:11,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:11,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964385298] [2021-11-23 02:15:11,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964385298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262531190] [2021-11-23 02:15:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:11,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:11,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:11,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:15:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:15:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:11,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:15:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:11,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-23 02:15:11,790 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-23 02:15:11,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 60 [2021-11-23 02:15:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:11,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:15:11,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:11,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-23 02:15:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:12,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:12,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-23 02:15:12,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:15:12,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:15:12,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:12,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-23 02:15:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:12,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262531190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:12,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286534074] [2021-11-23 02:15:12,546 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:15:12,546 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:12,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:12,547 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:12,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:12,639 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:15:12,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:15:12,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:15:12,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:15:12,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 54 [2021-11-23 02:15:12,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-23 02:15:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,321 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:15:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:15:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,572 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:15:13,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 561 [2021-11-23 02:15:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:13,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:13,789 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:15:13,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 533 [2021-11-23 02:15:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:17,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:15:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:18,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 76 [2021-11-23 02:15:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:18,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:15:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 167 [2021-11-23 02:15:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-11-23 02:15:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:19,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 115 [2021-11-23 02:15:20,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:21,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:23,280 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:15:23,285 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:25,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '718#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:25,521 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:25,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:25,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-11-23 02:15:25,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154719018] [2021-11-23 02:15:25,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:15:25,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:15:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:15:25,525 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 6 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-23 02:15:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:27,726 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2021-11-23 02:15:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:15:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 6 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 37 [2021-11-23 02:15:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:27,730 INFO L225 Difference]: With dead ends: 104 [2021-11-23 02:15:27,730 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:15:27,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=699, Invalid=4557, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 02:15:27,735 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 105 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:27,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 196 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:15:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:15:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 36. [2021-11-23 02:15:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 02:15:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-23 02:15:27,755 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 37 [2021-11-23 02:15:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:27,756 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-23 02:15:27,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 6 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-23 02:15:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-23 02:15:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:15:27,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:27,759 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:27,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:27,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:27,986 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1425303816, now seen corresponding path program 2 times [2021-11-23 02:15:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582697269] [2021-11-23 02:15:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:27,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:28,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582697269] [2021-11-23 02:15:28,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582697269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355470134] [2021-11-23 02:15:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:15:28,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:28,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:28,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:28,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:15:28,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:15:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:28,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:15:28,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:28,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:15:29,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355470134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924943982] [2021-11-23 02:15:29,250 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:15:29,251 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:29,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:29,252 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:29,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:29,333 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:15:29,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:15:29,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:15:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:15:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 54 [2021-11-23 02:15:29,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 63 [2021-11-23 02:15:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:29,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:29,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:29,997 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:15:29,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:15:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 106 [2021-11-23 02:15:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 97 [2021-11-23 02:15:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-23 02:15:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:30,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 91 [2021-11-23 02:15:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:32,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:15:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 76 [2021-11-23 02:15:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:33,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 173 [2021-11-23 02:15:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:34,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:15:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:34,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:15:34,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:34,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:34,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:34,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:36,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:37,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:37,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:37,708 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:15:37,712 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:39,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:39,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:39,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:39,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2021-11-23 02:15:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5942737] [2021-11-23 02:15:39,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:39,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:15:39,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:15:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:15:39,890 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:15:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:40,407 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-23 02:15:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:15:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 43 [2021-11-23 02:15:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:40,412 INFO L225 Difference]: With dead ends: 78 [2021-11-23 02:15:40,413 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:15:40,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:15:40,418 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 148 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:40,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 63 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:15:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:15:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2021-11-23 02:15:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:15:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-23 02:15:40,460 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 43 [2021-11-23 02:15:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-23 02:15:40,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:15:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-23 02:15:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:15:40,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:40,469 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:40,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:40,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1263391865, now seen corresponding path program 3 times [2021-11-23 02:15:40,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:40,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563452206] [2021-11-23 02:15:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:40,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:15:41,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563452206] [2021-11-23 02:15:41,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563452206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:41,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298240048] [2021-11-23 02:15:41,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:15:41,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:41,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:41,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:41,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:15:42,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:15:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:15:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:42,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:42,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:15:42,342 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-23 02:15:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 69 [2021-11-23 02:15:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-11-23 02:15:42,507 INFO L354 Elim1Store]: treesize reduction 182, result has 21.2 percent of original size [2021-11-23 02:15:42,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 97 [2021-11-23 02:15:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2021-11-23 02:15:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 36 [2021-11-23 02:15:42,769 INFO L354 Elim1Store]: treesize reduction 300, result has 19.6 percent of original size [2021-11-23 02:15:42,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 82 treesize of output 125 [2021-11-23 02:15:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 44 [2021-11-23 02:15:42,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:42,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 48 [2021-11-23 02:15:43,115 INFO L354 Elim1Store]: treesize reduction 280, result has 20.7 percent of original size [2021-11-23 02:15:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 80 treesize of output 126 [2021-11-23 02:15:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 44 [2021-11-23 02:15:43,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:43,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 52 [2021-11-23 02:15:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:15:43,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:44,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:44,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-23 02:15:44,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:15:44,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:15:44,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:15:44,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-23 02:15:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:15:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298240048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438626596] [2021-11-23 02:15:44,481 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:15:44,482 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:44,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:44,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:44,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:44,583 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:15:44,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:15:44,644 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:15:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:15:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:15:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 58 [2021-11-23 02:15:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 70 [2021-11-23 02:15:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,329 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:15:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:15:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,558 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:15:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 561 [2021-11-23 02:15:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:45,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:15:45,742 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:15:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 533 [2021-11-23 02:15:48,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:48,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:15:48,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:48,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:15:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:48,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:15:49,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 173 [2021-11-23 02:15:49,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:15:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:15:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:15:49,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:15:49,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:50,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:15:52,539 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:15:52,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:54,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1892#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:54,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:54,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:54,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 13] total 34 [2021-11-23 02:15:54,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075256452] [2021-11-23 02:15:54,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:54,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 02:15:54,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 02:15:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:15:54,872 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 33 states have internal predecessors, (86), 12 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-23 02:15:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:59,564 INFO L93 Difference]: Finished difference Result 182 states and 243 transitions. [2021-11-23 02:15:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 02:15:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 33 states have internal predecessors, (86), 12 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 64 [2021-11-23 02:15:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:59,568 INFO L225 Difference]: With dead ends: 182 [2021-11-23 02:15:59,568 INFO L226 Difference]: Without dead ends: 180 [2021-11-23 02:15:59,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1236, Invalid=9476, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 02:15:59,574 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 146 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:59,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 457 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:15:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-23 02:15:59,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 62. [2021-11-23 02:15:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:15:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-23 02:15:59,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 64 [2021-11-23 02:15:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:59,604 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-23 02:15:59,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 33 states have internal predecessors, (86), 12 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-23 02:15:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-23 02:15:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 02:15:59,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:59,607 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:59,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:15:59,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:59,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 339290674, now seen corresponding path program 4 times [2021-11-23 02:15:59,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:59,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723126788] [2021-11-23 02:15:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:59,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 127 proven. 41 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:16:00,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723126788] [2021-11-23 02:16:00,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723126788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808997879] [2021-11-23 02:16:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:16:00,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:00,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:00,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:16:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:00,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:16:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 155 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:16:01,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 155 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 02:16:02,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808997879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267484651] [2021-11-23 02:16:02,180 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:16:02,180 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:02,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:02,181 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:02,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:02,261 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:16:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:16:02,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-23 02:16:02,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:16:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 61 [2021-11-23 02:16:02,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 67 [2021-11-23 02:16:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:02,871 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:16:02,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:16:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:02,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 88 [2021-11-23 02:16:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:03,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 88 [2021-11-23 02:16:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 109 [2021-11-23 02:16:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 100 [2021-11-23 02:16:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:05,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:16:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:16:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:05,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 76 [2021-11-23 02:16:06,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:16:06,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:16:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:06,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 167 [2021-11-23 02:16:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-11-23 02:16:06,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:06,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 115 [2021-11-23 02:16:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:07,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:08,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:09,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:10,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:10,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:10,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:10,598 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:16:10,603 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:13,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2882#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:13,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:13,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 47 [2021-11-23 02:16:13,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622548163] [2021-11-23 02:16:13,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:13,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 02:16:13,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 02:16:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=3523, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 02:16:13,182 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-23 02:16:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:13,835 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2021-11-23 02:16:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:16:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 79 [2021-11-23 02:16:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:13,838 INFO L225 Difference]: With dead ends: 119 [2021-11-23 02:16:13,838 INFO L226 Difference]: Without dead ends: 83 [2021-11-23 02:16:13,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=753, Invalid=4217, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 02:16:13,843 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:13,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 105 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:16:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-23 02:16:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-11-23 02:16:13,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:16:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-11-23 02:16:13,868 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 79 [2021-11-23 02:16:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:13,868 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-11-23 02:16:13,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 47 states have internal predecessors, (143), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2021-11-23 02:16:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-11-23 02:16:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 02:16:13,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:13,872 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:13,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:16:14,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:14,094 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1008409791, now seen corresponding path program 5 times [2021-11-23 02:16:14,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:14,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30977891] [2021-11-23 02:16:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:14,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 02:16:15,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:15,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30977891] [2021-11-23 02:16:15,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30977891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:15,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432094905] [2021-11-23 02:16:15,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:15,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:15,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:15,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:16:23,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 02:16:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 02:16:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:23,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:16:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:16:45,664 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-23 02:16:45,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 69 [2021-11-23 02:16:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:45,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:16:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2021-11-23 02:16:47,985 INFO L354 Elim1Store]: treesize reduction 182, result has 21.2 percent of original size [2021-11-23 02:16:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 97 [2021-11-23 02:16:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2021-11-23 02:16:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:48,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 36 [2021-11-23 02:16:50,418 INFO L354 Elim1Store]: treesize reduction 300, result has 19.6 percent of original size [2021-11-23 02:16:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 82 treesize of output 125 [2021-11-23 02:16:50,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 44 [2021-11-23 02:16:50,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:50,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 48 [2021-11-23 02:16:52,978 INFO L354 Elim1Store]: treesize reduction 436, result has 18.2 percent of original size [2021-11-23 02:16:52,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 104 treesize of output 162 [2021-11-23 02:16:53,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:16:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:53,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 68 [2021-11-23 02:16:54,981 INFO L354 Elim1Store]: treesize reduction 253, result has 1.2 percent of original size [2021-11-23 02:16:54,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 103 treesize of output 49 [2021-11-23 02:16:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 100 proven. 191 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 02:16:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:57,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:16:57,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-11-23 02:16:57,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:16:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-11-23 02:16:57,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:16:57,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-11-23 02:16:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 02:16:57,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432094905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:57,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76063709] [2021-11-23 02:16:57,763 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:16:57,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:57,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:57,764 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:57,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:57,840 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:16:57,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:16:57,890 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:16:57,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:16:58,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:16:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 76 [2021-11-23 02:16:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 85 [2021-11-23 02:16:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:58,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:16:58,461 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:16:58,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:16:58,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 88 [2021-11-23 02:16:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 88 [2021-11-23 02:16:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 100 [2021-11-23 02:16:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:16:58,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 109 [2021-11-23 02:17:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:01,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:01,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:17:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:17:01,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:17:01,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:17:01,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:17:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:17:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 167 [2021-11-23 02:17:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-11-23 02:17:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 25 [2021-11-23 02:17:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:17:01,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-11-23 02:17:02,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:02,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:02,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:02,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:03,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:17:04,768 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:17:04,772 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:17,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3823#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:17,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:17,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:17,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 19] total 46 [2021-11-23 02:17:17,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678965496] [2021-11-23 02:17:17,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:17,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 02:17:17,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 02:17:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3620, Unknown=17, NotChecked=0, Total=4032 [2021-11-23 02:17:17,510 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 12 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-23 02:18:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:51,113 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2021-11-23 02:18:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 02:18:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 12 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) Word has length 100 [2021-11-23 02:18:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:51,116 INFO L225 Difference]: With dead ends: 140 [2021-11-23 02:18:51,116 INFO L226 Difference]: Without dead ends: 138 [2021-11-23 02:18:51,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 249 SyntacticMatches, 14 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 137.6s TimeCoverageRelationStatistics Valid=574, Invalid=5683, Unknown=63, NotChecked=0, Total=6320 [2021-11-23 02:18:51,120 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:51,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 362 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 659 Invalid, 0 Unknown, 171 Unchecked, 0.7s Time] [2021-11-23 02:18:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-23 02:18:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 107. [2021-11-23 02:18:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-23 02:18:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-11-23 02:18:51,147 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 100 [2021-11-23 02:18:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:51,148 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-11-23 02:18:51,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 12 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-23 02:18:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-11-23 02:18:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:18:51,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:51,152 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:51,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:51,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:51,366 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1537423560, now seen corresponding path program 6 times [2021-11-23 02:18:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974296039] [2021-11-23 02:18:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:51,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 302 proven. 79 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 02:18:52,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974296039] [2021-11-23 02:18:52,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974296039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240972895] [2021-11-23 02:18:52,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:18:52,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:52,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:52,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:18:52,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:18:52,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:18:52,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:18:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 345 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 02:18:54,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 345 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 02:18:55,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240972895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97642535] [2021-11-23 02:18:55,041 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:18:55,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:55,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:55,042 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:55,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:55,112 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-23 02:18:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 44 [2021-11-23 02:18:55,164 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-23 02:18:55,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-23 02:18:55,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 194 [2021-11-23 02:18:55,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 58 [2021-11-23 02:18:55,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 70 [2021-11-23 02:18:55,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:55,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:55,679 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 02:18:55,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 553 treesize of output 611 [2021-11-23 02:18:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:55,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:55,793 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:18:55,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 593 [2021-11-23 02:18:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:56,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:18:56,035 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 02:18:56,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 18 case distinctions, treesize of input 655 treesize of output 501 [2021-11-23 02:18:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:18:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:18:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 131 [2021-11-23 02:18:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:18:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2021-11-23 02:18:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-11-23 02:18:59,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:18:59,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:18:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 173 [2021-11-23 02:18:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-11-23 02:18:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:18:59,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 118 [2021-11-23 02:19:00,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:00,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:01,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:03,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:03,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:03,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 02:19:03,621 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 18 for LOIs [2021-11-23 02:19:03,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:19:06,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4972#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem14#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:19:06,795 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:19:06,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:19:06,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 22] total 65 [2021-11-23 02:19:06,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585495511] [2021-11-23 02:19:06,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:19:06,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 02:19:06,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 02:19:06,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=5666, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 02:19:06,803 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 65 states, 65 states have (on average 3.169230769230769) internal successors, (206), 65 states have internal predecessors, (206), 9 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2021-11-23 02:19:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:07,759 INFO L93 Difference]: Finished difference Result 153 states and 175 transitions. [2021-11-23 02:19:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:19:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.169230769230769) internal successors, (206), 65 states have internal predecessors, (206), 9 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 115 [2021-11-23 02:19:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:07,763 INFO L225 Difference]: With dead ends: 153 [2021-11-23 02:19:07,763 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:19:07,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1303, Invalid=6707, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 02:19:07,771 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 220 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:07,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 141 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:19:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:19:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-11-23 02:19:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-23 02:19:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2021-11-23 02:19:07,819 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 115 [2021-11-23 02:19:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:07,821 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2021-11-23 02:19:07,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.169230769230769) internal successors, (206), 65 states have internal predecessors, (206), 9 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2021-11-23 02:19:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2021-11-23 02:19:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 02:19:07,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:07,829 INFO L514 BasicCegarLoop]: trace histogram [20, 11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:07,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:08,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_895cb534-c331-43b5-9f34-c622f8380359/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:08,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1563641454, now seen corresponding path program 7 times [2021-11-23 02:19:08,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:08,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172992496] [2021-11-23 02:19:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:08,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat