/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:55:16,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:55:16,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:55:16,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:55:16,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:55:16,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:55:16,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:55:16,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:55:16,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:55:16,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:55:16,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:55:16,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:55:16,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:55:16,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:55:16,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:55:16,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:55:16,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:55:16,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:55:16,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:55:16,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:55:16,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:55:16,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:55:16,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:55:16,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:55:16,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:55:16,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:55:16,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:55:16,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:55:16,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:55:16,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:55:16,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:55:16,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:55:16,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:55:16,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:55:16,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:55:16,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:55:16,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:55:16,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:55:16,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:55:16,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:55:16,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:55:16,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:55:16,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:55:16,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:55:16,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:55:16,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:55:16,300 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:55:16,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:55:16,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:55:16,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:55:16,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:55:16,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:55:16,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:55:16,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:55:16,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:55:16,302 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:55:16,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:55:16,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:55:16,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:55:16,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:55:16,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:55:16,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:55:16,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:55:16,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:55:16,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:55:16,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:55:16,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:55:16,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:55:16,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:16,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:55:16,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:55:16,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:55:16,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:55:16,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:55:16,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:55:16,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:55:16,591 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:55:16,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 21:55:16,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7ea781/8c6c7345f8234ce1929a53704d6ebc06/FLAG793c7c12a [2020-07-20 21:55:17,254 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:55:17,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 21:55:17,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7ea781/8c6c7345f8234ce1929a53704d6ebc06/FLAG793c7c12a [2020-07-20 21:55:17,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7ea781/8c6c7345f8234ce1929a53704d6ebc06 [2020-07-20 21:55:17,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:55:17,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:55:17,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:55:17,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:55:17,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:55:17,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:55:17" (1/1) ... [2020-07-20 21:55:17,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b3e144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:17, skipping insertion in model container [2020-07-20 21:55:17,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:55:17" (1/1) ... [2020-07-20 21:55:17,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:55:17,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:55:18,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:55:18,077 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:55:18,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:55:18,186 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:55:18,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18 WrapperNode [2020-07-20 21:55:18,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:55:18,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:55:18,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:55:18,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:55:18,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... [2020-07-20 21:55:18,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:55:18,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:55:18,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:55:18,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:55:18,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:55:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:55:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:55:18,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:55:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 21:55:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 21:55:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 21:55:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 21:55:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 21:55:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 21:55:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 21:55:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 21:55:18,349 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 21:55:18,350 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 21:55:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 21:55:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 21:55:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 21:55:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 21:55:18,351 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 21:55:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 21:55:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 21:55:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 21:55:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 21:55:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 21:55:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 21:55:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 21:55:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 21:55:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 21:55:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 21:55:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 21:55:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 21:55:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 21:55:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:55:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:55:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:55:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:55:19,073 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:55:19,074 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 21:55:19,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:55:19 BoogieIcfgContainer [2020-07-20 21:55:19,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:55:19,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:55:19,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:55:19,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:55:19,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:55:17" (1/3) ... [2020-07-20 21:55:19,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140d04dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:55:19, skipping insertion in model container [2020-07-20 21:55:19,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:55:18" (2/3) ... [2020-07-20 21:55:19,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140d04dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:55:19, skipping insertion in model container [2020-07-20 21:55:19,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:55:19" (3/3) ... [2020-07-20 21:55:19,087 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-07-20 21:55:19,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:55:19,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 21:55:19,121 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 21:55:19,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:55:19,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:55:19,148 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:55:19,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:55:19,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:55:19,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:55:19,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:55:19,150 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:55:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-07-20 21:55:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 21:55:19,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:19,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:19,183 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-07-20 21:55:19,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:19,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981801551] [2020-07-20 21:55:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:19,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:55:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:19,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:19,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981801551] [2020-07-20 21:55:19,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:19,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133056515] [2020-07-20 21:55:19,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:19,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:19,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:19,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:19,459 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 3 states. [2020-07-20 21:55:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:19,538 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-07-20 21:55:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:19,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 21:55:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:19,551 INFO L225 Difference]: With dead ends: 188 [2020-07-20 21:55:19,551 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 21:55:19,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 21:55:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-20 21:55:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 21:55:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-07-20 21:55:19,605 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-07-20 21:55:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:19,605 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-07-20 21:55:19,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-07-20 21:55:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:55:19,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:19,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:19,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:19,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-07-20 21:55:19,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:19,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963531457] [2020-07-20 21:55:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:19,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:55:19,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:55:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:19,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:19,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963531457] [2020-07-20 21:55:19,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:19,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:19,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361486941] [2020-07-20 21:55:19,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:19,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:19,940 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 3 states. [2020-07-20 21:55:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:19,958 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-07-20 21:55:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:19,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 21:55:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:19,963 INFO L225 Difference]: With dead ends: 85 [2020-07-20 21:55:19,963 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 21:55:19,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 21:55:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-07-20 21:55:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 21:55:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-07-20 21:55:19,975 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 14 [2020-07-20 21:55:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:19,976 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-07-20 21:55:19,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-07-20 21:55:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:55:19,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:19,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:20,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:20,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-07-20 21:55:20,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:20,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273164284] [2020-07-20 21:55:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:20,286 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 21:55:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:20,357 INFO L384 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 [2020-07-20 21:55:20,358 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:20,374 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:20,379 INFO L384 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 [2020-07-20 21:55:20,379 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:20,387 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:20,388 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:20,388 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-20 21:55:20,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:55:20,415 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:55:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:20,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:20,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273164284] [2020-07-20 21:55:20,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:20,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:20,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459418406] [2020-07-20 21:55:20,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:20,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:20,431 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 5 states. [2020-07-20 21:55:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:20,591 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2020-07-20 21:55:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:55:20,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:55:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:20,594 INFO L225 Difference]: With dead ends: 158 [2020-07-20 21:55:20,594 INFO L226 Difference]: Without dead ends: 156 [2020-07-20 21:55:20,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-20 21:55:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 85. [2020-07-20 21:55:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 21:55:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-07-20 21:55:20,607 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 14 [2020-07-20 21:55:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:20,607 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-07-20 21:55:20,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-07-20 21:55:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:55:20,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:20,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:20,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:20,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-07-20 21:55:20,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:20,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906473298] [2020-07-20 21:55:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:20,962 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:55:20,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:20,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:55:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:20,983 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:20,984 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:20,991 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:20,993 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:20,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 21:55:21,033 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:21,034 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:21,036 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:21,059 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:21,065 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_35|], 8=[|v_#memory_$Pointer$.base_35|]} [2020-07-20 21:55:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:21,074 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:21,096 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:21,108 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 21:55:21,109 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:21,120 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:21,123 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:21,123 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-20 21:55:21,147 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:55:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:21,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906473298] [2020-07-20 21:55:21,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:21,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:21,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14459339] [2020-07-20 21:55:21,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:21,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:21,159 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 5 states. [2020-07-20 21:55:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:21,351 INFO L93 Difference]: Finished difference Result 224 states and 250 transitions. [2020-07-20 21:55:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:55:21,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 21:55:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:21,355 INFO L225 Difference]: With dead ends: 224 [2020-07-20 21:55:21,355 INFO L226 Difference]: Without dead ends: 154 [2020-07-20 21:55:21,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:55:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-20 21:55:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 82. [2020-07-20 21:55:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 21:55:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-07-20 21:55:21,366 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 14 [2020-07-20 21:55:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:21,366 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-07-20 21:55:21,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-07-20 21:55:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:55:21,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:21,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:21,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:21,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1093009051, now seen corresponding path program 1 times [2020-07-20 21:55:21,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:21,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790789147] [2020-07-20 21:55:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:21,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:55:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:21,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:21,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790789147] [2020-07-20 21:55:21,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:21,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:21,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126487172] [2020-07-20 21:55:21,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:21,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:21,709 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 3 states. [2020-07-20 21:55:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:21,751 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-07-20 21:55:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:21,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:55:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:21,753 INFO L225 Difference]: With dead ends: 85 [2020-07-20 21:55:21,753 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 21:55:21,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 21:55:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-20 21:55:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 21:55:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-07-20 21:55:21,760 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 19 [2020-07-20 21:55:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:21,760 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-07-20 21:55:21,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-07-20 21:55:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:55:21,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:21,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:21,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:21,974 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash -476453587, now seen corresponding path program 1 times [2020-07-20 21:55:21,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:21,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250275326] [2020-07-20 21:55:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:22,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:22,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:55:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:22,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:22,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250275326] [2020-07-20 21:55:22,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:22,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:55:22,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014337574] [2020-07-20 21:55:22,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:55:22,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:55:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:55:22,081 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 4 states. [2020-07-20 21:55:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:22,160 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2020-07-20 21:55:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:55:22,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 21:55:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:22,161 INFO L225 Difference]: With dead ends: 138 [2020-07-20 21:55:22,162 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 21:55:22,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 21:55:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2020-07-20 21:55:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 21:55:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-07-20 21:55:22,168 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 20 [2020-07-20 21:55:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:22,169 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-07-20 21:55:22,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:55:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-07-20 21:55:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:55:22,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:22,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:22,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:22,371 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 337242584, now seen corresponding path program 1 times [2020-07-20 21:55:22,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:22,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692812433] [2020-07-20 21:55:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:22,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:22,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:55:22,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:22,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:22,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692812433] [2020-07-20 21:55:22,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:22,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:22,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289066659] [2020-07-20 21:55:22,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:22,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:22,508 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 3 states. [2020-07-20 21:55:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:22,524 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-07-20 21:55:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:22,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:55:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:22,526 INFO L225 Difference]: With dead ends: 103 [2020-07-20 21:55:22,526 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 21:55:22,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 21:55:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-07-20 21:55:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 21:55:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-07-20 21:55:22,533 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 24 [2020-07-20 21:55:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:22,534 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-07-20 21:55:22,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-07-20 21:55:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:55:22,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:22,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:22,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:22,749 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1864575058, now seen corresponding path program 1 times [2020-07-20 21:55:22,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:22,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955210476] [2020-07-20 21:55:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:22,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:22,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 21:55:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:22,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:22,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955210476] [2020-07-20 21:55:22,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:22,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:22,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095415797] [2020-07-20 21:55:22,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:22,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:22,854 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 3 states. [2020-07-20 21:55:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:22,867 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-07-20 21:55:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:22,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:55:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:22,869 INFO L225 Difference]: With dead ends: 79 [2020-07-20 21:55:22,870 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 21:55:22,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 21:55:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-20 21:55:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 21:55:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-07-20 21:55:22,876 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 25 [2020-07-20 21:55:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:22,876 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-07-20 21:55:22,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:22,876 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-07-20 21:55:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:55:22,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:22,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:23,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:23,092 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:23,093 INFO L82 PathProgramCache]: Analyzing trace with hash -660297045, now seen corresponding path program 1 times [2020-07-20 21:55:23,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:23,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691407166] [2020-07-20 21:55:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:23,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 21:55:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:23,239 INFO L384 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 [2020-07-20 21:55:23,240 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,247 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,251 INFO L384 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 [2020-07-20 21:55:23,251 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,257 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,257 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 21:55:23,279 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:55:23,283 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:55:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:23,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:23,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691407166] [2020-07-20 21:55:23,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:23,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:55:23,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270436316] [2020-07-20 21:55:23,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:55:23,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:55:23,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:55:23,300 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 4 states. [2020-07-20 21:55:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:23,399 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-07-20 21:55:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:55:23,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 21:55:23,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:23,401 INFO L225 Difference]: With dead ends: 87 [2020-07-20 21:55:23,401 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 21:55:23,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 21:55:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-07-20 21:55:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:55:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-07-20 21:55:23,408 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 27 [2020-07-20 21:55:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:23,410 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-07-20 21:55:23,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:55:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-07-20 21:55:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 21:55:23,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:23,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:23,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:23,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash -658450003, now seen corresponding path program 1 times [2020-07-20 21:55:23,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:23,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204221964] [2020-07-20 21:55:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:23,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:55:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 21:55:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:23,712 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:23,713 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,716 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,716 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,716 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 21:55:23,746 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,747 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:23,748 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,772 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,775 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_37|], 8=[|v_#memory_$Pointer$.base_37|]} [2020-07-20 21:55:23,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:23,779 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,791 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:23,806 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 21:55:23,807 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-20 21:55:23,807 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:23,820 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:23,822 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:23,822 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 21:55:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:23,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:23,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204221964] [2020-07-20 21:55:23,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:23,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:23,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555581820] [2020-07-20 21:55:23,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:23,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:23,889 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 5 states. [2020-07-20 21:55:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:24,087 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-07-20 21:55:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:55:24,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 21:55:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:24,089 INFO L225 Difference]: With dead ends: 148 [2020-07-20 21:55:24,089 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 21:55:24,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 21:55:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-07-20 21:55:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 21:55:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-07-20 21:55:24,095 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 27 [2020-07-20 21:55:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:24,096 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-07-20 21:55:24,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-07-20 21:55:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:55:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:24,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:24,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:24,312 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash 747608077, now seen corresponding path program 1 times [2020-07-20 21:55:24,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:24,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718408084] [2020-07-20 21:55:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:24,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:24,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:24,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 21:55:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:24,423 INFO L384 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 [2020-07-20 21:55:24,424 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,430 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:24,442 INFO L384 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 [2020-07-20 21:55:24,443 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,450 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:24,451 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,451 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 21:55:24,475 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:24,476 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,485 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:24,488 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:24,488 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,496 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:24,497 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:24,497 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 21:55:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:24,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:24,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718408084] [2020-07-20 21:55:24,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:24,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 21:55:24,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953352677] [2020-07-20 21:55:24,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:24,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:24,511 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 5 states. [2020-07-20 21:55:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:24,691 INFO L93 Difference]: Finished difference Result 179 states and 205 transitions. [2020-07-20 21:55:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:55:24,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-20 21:55:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:24,694 INFO L225 Difference]: With dead ends: 179 [2020-07-20 21:55:24,694 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 21:55:24,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:55:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 21:55:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-07-20 21:55:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 21:55:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-07-20 21:55:24,702 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 28 [2020-07-20 21:55:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:24,702 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-07-20 21:55:24,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-07-20 21:55:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 21:55:24,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:24,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:24,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:24,918 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-07-20 21:55:24,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:24,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623569187] [2020-07-20 21:55:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:25,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:55:25,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:25,034 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:25,034 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,040 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,040 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,040 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 21:55:25,073 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,074 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:25,074 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,113 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:25,143 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 21:55:25,144 INFO L384 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-20 21:55:25,144 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,164 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:25,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-20 21:55:25,186 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,204 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,205 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,206 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 21:55:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:55:25,329 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 21:55:25,329 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-20 21:55:25,333 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:55:25,335 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:55:25,337 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:25,370 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-20 21:55:25,388 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,388 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-20 21:55:25,390 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,399 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:25,400 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:25,400 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-20 21:55:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:25,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:25,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623569187] [2020-07-20 21:55:25,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:25,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:55:25,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570529168] [2020-07-20 21:55:25,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:55:25,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:25,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:55:25,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:25,422 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 7 states. [2020-07-20 21:55:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:26,262 INFO L93 Difference]: Finished difference Result 231 states and 259 transitions. [2020-07-20 21:55:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 21:55:26,263 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 21:55:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:26,265 INFO L225 Difference]: With dead ends: 231 [2020-07-20 21:55:26,265 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 21:55:26,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 21:55:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 21:55:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 99. [2020-07-20 21:55:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 21:55:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-07-20 21:55:26,275 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 28 [2020-07-20 21:55:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:26,275 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-07-20 21:55:26,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:55:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-07-20 21:55:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 21:55:26,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:26,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:26,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:26,492 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -673496803, now seen corresponding path program 1 times [2020-07-20 21:55:26,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:26,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144597706] [2020-07-20 21:55:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:26,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 21:55:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:26,602 INFO L384 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 [2020-07-20 21:55:26,602 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,613 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:26,619 INFO L384 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 [2020-07-20 21:55:26,619 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,624 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:26,625 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,625 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 21:55:26,649 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:26,650 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,656 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:26,660 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 21:55:26,661 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,663 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:26,664 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:26,664 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 21:55:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:55:26,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:26,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144597706] [2020-07-20 21:55:26,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:26,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:55:26,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906539043] [2020-07-20 21:55:26,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:55:26,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:55:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:55:26,685 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 4 states. [2020-07-20 21:55:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:26,800 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2020-07-20 21:55:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:55:26,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-07-20 21:55:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:26,802 INFO L225 Difference]: With dead ends: 145 [2020-07-20 21:55:26,803 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 21:55:26,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 21:55:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-07-20 21:55:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 21:55:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2020-07-20 21:55:26,812 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 30 [2020-07-20 21:55:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:26,812 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2020-07-20 21:55:26,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:55:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2020-07-20 21:55:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 21:55:26,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:26,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:27,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:27,023 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -250794977, now seen corresponding path program 1 times [2020-07-20 21:55:27,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:27,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680002136] [2020-07-20 21:55:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:27,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 21:55:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:27,142 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:27,142 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,146 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:27,147 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 21:55:27,174 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:27,175 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:27,176 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,204 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:27,206 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_41|], 8=[|v_#memory_$Pointer$.base_41|]} [2020-07-20 21:55:27,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:27,210 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,226 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:27,232 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2020-07-20 21:55:27,233 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,261 INFO L624 ElimStorePlain]: treesize reduction 4, result has 88.6 percent of original size [2020-07-20 21:55:27,262 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,263 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:189, output treesize:40 [2020-07-20 21:55:27,315 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:27,316 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2020-07-20 21:55:27,317 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,330 INFO L624 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2020-07-20 21:55:27,331 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:27,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:4 [2020-07-20 21:55:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:27,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:27,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680002136] [2020-07-20 21:55:27,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:27,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:55:27,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028307431] [2020-07-20 21:55:27,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:55:27,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:27,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:55:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:55:27,350 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 6 states. [2020-07-20 21:55:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:27,754 INFO L93 Difference]: Finished difference Result 256 states and 296 transitions. [2020-07-20 21:55:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 21:55:27,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 21:55:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:27,757 INFO L225 Difference]: With dead ends: 256 [2020-07-20 21:55:27,757 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 21:55:27,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 21:55:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 21:55:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 119. [2020-07-20 21:55:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 21:55:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-07-20 21:55:27,767 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-07-20 21:55:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:27,767 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-07-20 21:55:27,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:55:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-07-20 21:55:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 21:55:27,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:27,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:27,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:27,977 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:27,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-07-20 21:55:27,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:27,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661743354] [2020-07-20 21:55:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:28,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 21:55:28,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:28,103 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:28,104 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,110 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,111 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 21:55:28,161 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,162 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:28,162 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,200 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:28,225 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 21:55:28,226 INFO L384 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 1 case distinctions, treesize of input 141 treesize of output 130 [2020-07-20 21:55:28,226 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,251 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:28,257 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-20 21:55:28,258 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,274 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,275 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,275 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 21:55:28,382 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,383 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 53 [2020-07-20 21:55:28,384 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:55:28,385 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 21:55:28,387 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:28,414 INFO L624 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2020-07-20 21:55:28,434 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,435 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 32 [2020-07-20 21:55:28,435 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,443 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:28,444 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:28,444 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:90, output treesize:7 [2020-07-20 21:55:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:28,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:28,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661743354] [2020-07-20 21:55:28,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:28,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 21:55:28,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045962373] [2020-07-20 21:55:28,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 21:55:28,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 21:55:28,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:55:28,467 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 7 states. [2020-07-20 21:55:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:29,074 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2020-07-20 21:55:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 21:55:29,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 21:55:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:29,077 INFO L225 Difference]: With dead ends: 208 [2020-07-20 21:55:29,077 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 21:55:29,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-07-20 21:55:29,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 21:55:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 122. [2020-07-20 21:55:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 21:55:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-07-20 21:55:29,104 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 31 [2020-07-20 21:55:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:29,104 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-07-20 21:55:29,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 21:55:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-07-20 21:55:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 21:55:29,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:29,111 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:29,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:29,312 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash -670241930, now seen corresponding path program 1 times [2020-07-20 21:55:29,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:29,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706698184] [2020-07-20 21:55:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:29,406 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 21:55:29,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:29,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:55:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:29,418 INFO L384 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 11 treesize of output 7 [2020-07-20 21:55:29,419 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,425 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,429 INFO L384 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 11 treesize of output 7 [2020-07-20 21:55:29,429 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,434 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,434 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,435 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-07-20 21:55:29,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:29,468 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-20 21:55:29,469 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,477 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:29,481 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-20 21:55:29,482 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,490 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,491 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,491 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2020-07-20 21:55:29,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:29,517 INFO L384 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 24 treesize of output 10 [2020-07-20 21:55:29,518 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,526 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,530 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 21:55:29,530 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2020-07-20 21:55:29,531 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,535 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:29,536 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:29,536 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-20 21:55:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:55:29,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:55:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 21:55:29,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706698184] [2020-07-20 21:55:29,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:55:29,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2020-07-20 21:55:29,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2643248] [2020-07-20 21:55:29,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 21:55:29,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 21:55:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:29,572 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 5 states. [2020-07-20 21:55:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:29,680 INFO L93 Difference]: Finished difference Result 190 states and 216 transitions. [2020-07-20 21:55:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 21:55:29,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-20 21:55:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:29,682 INFO L225 Difference]: With dead ends: 190 [2020-07-20 21:55:29,682 INFO L226 Difference]: Without dead ends: 165 [2020-07-20 21:55:29,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 21:55:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-20 21:55:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-07-20 21:55:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 21:55:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2020-07-20 21:55:29,693 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 33 [2020-07-20 21:55:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:29,694 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2020-07-20 21:55:29,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 21:55:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2020-07-20 21:55:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 21:55:29,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:29,695 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:29,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:29,908 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1460474208, now seen corresponding path program 1 times [2020-07-20 21:55:29,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:29,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477215657] [2020-07-20 21:55:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:30,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 21:55:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:30,009 INFO L384 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 11 treesize of output 7 [2020-07-20 21:55:30,010 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,016 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,020 INFO L384 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 11 treesize of output 7 [2020-07-20 21:55:30,020 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,025 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,026 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,026 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-20 21:55:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:30,049 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-20 21:55:30,049 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,066 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:30,070 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-07-20 21:55:30,071 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,081 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,081 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,081 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:36 [2020-07-20 21:55:30,127 INFO L384 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 22 treesize of output 10 [2020-07-20 21:55:30,128 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,134 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,136 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,137 INFO L384 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 1 case distinctions, treesize of input 22 treesize of output 10 [2020-07-20 21:55:30,137 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,141 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:30,141 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:30,141 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2020-07-20 21:55:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:30,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:55:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:30,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477215657] [2020-07-20 21:55:30,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:55:30,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 21:55:30,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674898156] [2020-07-20 21:55:30,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 21:55:30,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:30,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 21:55:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 21:55:30,210 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand 8 states. [2020-07-20 21:55:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:30,511 INFO L93 Difference]: Finished difference Result 201 states and 229 transitions. [2020-07-20 21:55:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:55:30,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-20 21:55:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:30,512 INFO L225 Difference]: With dead ends: 201 [2020-07-20 21:55:30,512 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 21:55:30,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 21:55:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 21:55:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2020-07-20 21:55:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 21:55:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-07-20 21:55:30,520 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 33 [2020-07-20 21:55:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:30,521 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-07-20 21:55:30,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 21:55:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-07-20 21:55:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 21:55:30,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:30,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:30,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:30,729 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-07-20 21:55:30,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:30,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166123035] [2020-07-20 21:55:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:30,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:55:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:30,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:30,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166123035] [2020-07-20 21:55:30,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:30,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:30,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073528074] [2020-07-20 21:55:30,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:30,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:30,851 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 3 states. [2020-07-20 21:55:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:30,872 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2020-07-20 21:55:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:30,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 21:55:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:30,873 INFO L225 Difference]: With dead ends: 161 [2020-07-20 21:55:30,874 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 21:55:30,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 21:55:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2020-07-20 21:55:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-20 21:55:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2020-07-20 21:55:30,883 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 36 [2020-07-20 21:55:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:30,884 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2020-07-20 21:55:30,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2020-07-20 21:55:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 21:55:30,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:30,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:31,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:31,099 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:31,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1632051366, now seen corresponding path program 1 times [2020-07-20 21:55:31,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:31,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389122230] [2020-07-20 21:55:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:31,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:55:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:55:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:31,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:55:31,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389122230] [2020-07-20 21:55:31,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:55:31,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:55:31,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577604118] [2020-07-20 21:55:31,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:55:31,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:55:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:55:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:31,225 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand 3 states. [2020-07-20 21:55:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:55:31,248 INFO L93 Difference]: Finished difference Result 264 states and 317 transitions. [2020-07-20 21:55:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:55:31,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 21:55:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:55:31,250 INFO L225 Difference]: With dead ends: 264 [2020-07-20 21:55:31,250 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 21:55:31,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:55:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 21:55:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2020-07-20 21:55:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 21:55:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2020-07-20 21:55:31,261 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 36 [2020-07-20 21:55:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:55:31,261 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2020-07-20 21:55:31,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:55:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2020-07-20 21:55:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:55:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:55:31,262 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:55:31,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:31,476 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:55:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:55:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1753137100, now seen corresponding path program 1 times [2020-07-20 21:55:31,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:55:31,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659457365] [2020-07-20 21:55:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:55:31,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:55:31,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:55:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 21:55:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:55:31,619 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-20 21:55:31,620 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,624 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,624 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 21:55:31,632 INFO L384 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 [2020-07-20 21:55:31,632 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,639 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,641 INFO L384 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 [2020-07-20 21:55:31,642 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,647 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,648 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,648 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:24 [2020-07-20 21:55:31,690 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,690 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-20 21:55:31,691 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 21:55:31,692 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,710 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:31,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2020-07-20 21:55:31,723 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,739 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:31,745 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2020-07-20 21:55:31,745 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,760 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,761 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:31,761 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:86, output treesize:47 [2020-07-20 21:55:31,803 INFO L440 ElimStorePlain]: Different costs {6=[|v_#memory_$Pointer$.offset_53|], 12=[|v_#memory_$Pointer$.base_53|]} [2020-07-20 21:55:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:31,809 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2020-07-20 21:55:31,810 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,829 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:31,919 INFO L350 Elim1Store]: treesize reduction 46, result has 65.2 percent of original size [2020-07-20 21:55:31,920 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 124 [2020-07-20 21:55:31,924 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-07-20 21:55:31,924 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-07-20 21:55:31,926 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:31,969 INFO L624 ElimStorePlain]: treesize reduction 64, result has 54.9 percent of original size [2020-07-20 21:55:31,971 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 21:55:31,971 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:94, output treesize:78 [2020-07-20 21:55:33,796 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 21:55:33,811 INFO L440 ElimStorePlain]: Different costs {6=[|#memory_$Pointer$.offset|], 12=[|#memory_$Pointer$.base|]} [2020-07-20 21:55:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:33,816 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2020-07-20 21:55:33,816 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:33,834 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 21:55:33,889 INFO L350 Elim1Store]: treesize reduction 10, result has 85.1 percent of original size [2020-07-20 21:55:33,890 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 76 [2020-07-20 21:55:33,891 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 21:55:33,891 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 21:55:33,892 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 21:55:33,900 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 21:55:33,900 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:55:33,901 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:96, output treesize:7 [2020-07-20 21:55:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:55:33,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:55:34,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:55:38,457 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 21:55:38,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 21:55:46,675 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 21:56:03,184 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 21:56:03,188 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 21:56:03,191 INFO L624 ElimStorePlain]: treesize reduction 56, result has 1.8 percent of original size [2020-07-20 21:56:03,191 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-20 21:56:03,191 INFO L544 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 21:56:03,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 11 variables, input treesize:115, output treesize:1 [2020-07-20 21:56:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:56:03,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659457365] [2020-07-20 21:56:03,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:56:03,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-20 21:56:03,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840554783] [2020-07-20 21:56:03,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 21:56:03,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:56:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 21:56:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=135, Unknown=2, NotChecked=0, Total=182 [2020-07-20 21:56:03,207 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 14 states. [2020-07-20 21:56:17,273 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-07-20 21:56:18,269 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-07-20 21:56:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:56:30,474 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2020-07-20 21:56:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 21:56:30,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-07-20 21:56:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:56:30,477 INFO L225 Difference]: With dead ends: 422 [2020-07-20 21:56:30,477 INFO L226 Difference]: Without dead ends: 368 [2020-07-20 21:56:30,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=257, Invalid=730, Unknown=5, NotChecked=0, Total=992 [2020-07-20 21:56:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-07-20 21:56:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 171. [2020-07-20 21:56:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 21:56:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2020-07-20 21:56:30,491 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 40 [2020-07-20 21:56:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:56:30,491 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2020-07-20 21:56:30,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 21:56:30,491 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2020-07-20 21:56:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:56:30,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:56:30,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:56:30,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:56:30,706 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:56:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:56:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1659756179, now seen corresponding path program 1 times [2020-07-20 21:56:30,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:56:30,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694003730] [2020-07-20 21:56:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:56:30,810 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:56:30,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:56:30,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 21:56:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:56:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 21:56:30,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:56:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694003730] [2020-07-20 21:56:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:56:30,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:56:30,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664723102] [2020-07-20 21:56:30,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:56:30,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:56:30,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:56:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:56:30,827 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 3 states. [2020-07-20 21:56:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:56:30,850 INFO L93 Difference]: Finished difference Result 277 states and 331 transitions. [2020-07-20 21:56:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:56:30,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-07-20 21:56:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:56:30,852 INFO L225 Difference]: With dead ends: 277 [2020-07-20 21:56:30,852 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 21:56:30,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:56:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 21:56:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2020-07-20 21:56:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 21:56:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2020-07-20 21:56:30,862 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 40 [2020-07-20 21:56:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:56:30,863 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2020-07-20 21:56:30,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:56:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2020-07-20 21:56:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 21:56:30,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:56:30,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:56:31,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:56:31,079 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:56:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:56:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-07-20 21:56:31,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:56:31,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97676430] [2020-07-20 21:56:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:56:31,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:56:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:56:31,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:56:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:56:31,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:56:31,242 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:56:31,242 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:56:31,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:56:31,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:56:31 BoogieIcfgContainer [2020-07-20 21:56:31,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:56:31,503 INFO L168 Benchmark]: Toolchain (without parser) took 74001.90 ms. Allocated memory was 135.8 MB in the beginning and 350.2 MB in the end (delta: 214.4 MB). Free memory was 99.3 MB in the beginning and 118.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 195.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,503 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.87 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 98.8 MB in the beginning and 167.2 MB in the end (delta: -68.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,504 INFO L168 Benchmark]: Boogie Preprocessor took 83.58 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 164.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,504 INFO L168 Benchmark]: RCFGBuilder took 807.20 ms. Allocated memory is still 200.8 MB. Free memory was 163.6 MB in the beginning and 108.0 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,505 INFO L168 Benchmark]: TraceAbstraction took 72421.82 ms. Allocated memory was 200.8 MB in the beginning and 350.2 MB in the end (delta: 149.4 MB). Free memory was 108.0 MB in the beginning and 118.2 MB in the end (delta: -10.3 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:56:31,506 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 135.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.87 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 98.8 MB in the beginning and 167.2 MB in the end (delta: -68.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.58 ms. Allocated memory is still 200.8 MB. Free memory was 167.2 MB in the beginning and 164.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 807.20 ms. Allocated memory is still 200.8 MB. Free memory was 163.6 MB in the beginning and 108.0 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72421.82 ms. Allocated memory was 200.8 MB in the beginning and 350.2 MB in the end (delta: 149.4 MB). Free memory was 108.0 MB in the beginning and 118.2 MB in the end (delta: -10.3 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1025]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L991] SLL* list = malloc(sizeof(SLL)); [L992] list->next = ((void*)0) VAL [list={18588:0}, malloc(sizeof(SLL))={18588:0}] [L993] COND FALSE !(!(list != ((void*)0))) VAL [list={18588:0}, malloc(sizeof(SLL))={18588:0}] [L993] COND FALSE !(__VERIFIER_nondet_int()) [L993] list->inner = malloc(sizeof(SLL)) [L993] EXPR list->inner [L993] list->inner->next = ((void*)0) [L993] EXPR list->inner [L993] list->inner->inner = ((void*)0) [L993] EXPR list->inner [L993] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={18588:0}, list->inner={-1:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L993] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L995] SLL* end = list; VAL [end={18588:0}, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L998] COND FALSE !(__VERIFIER_nondet_int()) [L1008] end = ((void*)0) [L1009] end = list VAL [end={18588:0}, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1012] COND FALSE !(!(((void*)0) != end)) VAL [end={18588:0}, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1014] COND TRUE ((void*)0) != end [L1016] int len = 0; [L1017] EXPR end->inner [L1017] SLL* inner = end->inner; [L1018] COND TRUE ((void*)0) != inner VAL [end={18588:0}, inner={-1:0}, len=0, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1020] COND TRUE len == 0 [L1021] len = 1 VAL [end={18588:0}, inner={-1:0}, len=1, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={18588:0}, inner={-1:0}, len=1, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1025] EXPR inner->inner VAL [end={18588:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1025] COND FALSE !(!(((void*)0) == inner->inner)) [L1026] EXPR inner->next VAL [end={18588:0}, inner={-1:0}, inner->next={0:0}, len=1, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1026] COND FALSE !(!(((void*)0) == inner->next)) [L1027] EXPR inner->inner [L1027] inner = inner->inner [L1028] COND TRUE len == 1 [L1029] EXPR inner->inner [L1029] inner = inner->inner [L1018] COND TRUE ((void*)0) != inner VAL [end={18588:0}, inner={11:12618}, len=1, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1020] COND FALSE !(len == 0) [L1023] len = 2 VAL [end={18588:0}, inner={11:12618}, len=2, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={18588:0}, inner={11:12618}, len=2, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1025] EXPR inner->inner VAL [end={18588:0}, inner={11:12618}, inner->inner={14:16}, len=2, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] [L1025] COND TRUE !(((void*)0) == inner->inner) [L1025] __VERIFIER_error() VAL [end={18588:0}, inner={11:12618}, len=2, list={18588:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={18588:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 89 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 72.3s, OverallIterations: 22, TraceHistogramMax: 2, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1802 SDtfs, 2293 SDslu, 3483 SDs, 0 SdLazy, 1677 SolverSat, 190 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 21.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 691 GetRequests, 575 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 40.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 887 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 33.9s InterpolantComputationTime, 597 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 639 ConstructedInterpolants, 38 QuantifiedInterpolants, 281884 SizeOfPredicates, 113 NumberOfNonLiveVariables, 1561 ConjunctsInSsa, 226 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 16/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...