/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 NUM_FUNCTIONS --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 13:55:49,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:55:49,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:55:49,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:55:49,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:55:49,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:55:49,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:55:49,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:55:49,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:55:49,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:55:49,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:55:49,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:55:49,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:55:49,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:55:49,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:55:49,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:55:49,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:55:49,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:55:49,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:55:49,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:55:49,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:55:49,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:55:49,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:55:49,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:55:49,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:55:49,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:55:49,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:55:49,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:55:49,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:55:49,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:55:49,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:55:49,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:55:49,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:55:49,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:55:49,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:55:49,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:55:49,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:55:49,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:55:49,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:55:49,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:55:49,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:55:49,367 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 13:55:49,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:55:49,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:55:49,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:55:49,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:55:49,410 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:55:49,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:55:49,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:55:49,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:55:49,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:55:49,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:55:49,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:55:49,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:55:49,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:55:49,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:55:49,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:55:49,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:55:49,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:55:49,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:55:49,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:55:49,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:55:49,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:55:49,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:55:49,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:55:49,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:55:49,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:55:49,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:55:49,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:49,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:55:49,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:55:49,419 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 -> NUM_FUNCTIONS 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 13:55:49,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:55:49,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:55:49,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:55:49,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:55:49,752 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:55:49,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 13:55:49,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d29843b/b21dfa53edc84833b86753d33e345921/FLAG3f0917d9e [2020-07-20 13:55:50,371 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:55:50,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-07-20 13:55:50,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d29843b/b21dfa53edc84833b86753d33e345921/FLAG3f0917d9e [2020-07-20 13:55:50,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d29843b/b21dfa53edc84833b86753d33e345921 [2020-07-20 13:55:50,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:55:50,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:55:50,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:50,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:55:50,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:55:50,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:50" (1/1) ... [2020-07-20 13:55:50,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db3d8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:50, skipping insertion in model container [2020-07-20 13:55:50,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:50" (1/1) ... [2020-07-20 13:55:50,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:55:50,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:55:51,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:51,218 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:55:51,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:51,320 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:55:51,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51 WrapperNode [2020-07-20 13:55:51,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:51,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:55:51,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:55:51,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:55:51,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (1/1) ... [2020-07-20 13:55:51,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:55:51,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:55:51,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:55:51,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:55:51,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (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 13:55:51,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:55:51,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:55:51,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:55:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:55:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:55:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:55:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:55:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:55:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:55:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:55:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:55:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:55:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:55:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:55:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:55:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:55:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:55:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:55:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:55:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:55:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:55:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:55:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:55:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:55:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:55:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:55:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:55:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:55:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:55:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:55:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:55:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:55:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:55:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:55:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:55:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:55:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:55:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:55:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:55:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:55:52,149 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:55:52,149 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 13:55:52,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:52 BoogieIcfgContainer [2020-07-20 13:55:52,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:55:52,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:55:52,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:55:52,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:55:52,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:55:50" (1/3) ... [2020-07-20 13:55:52,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208a2de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:52, skipping insertion in model container [2020-07-20 13:55:52,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:51" (2/3) ... [2020-07-20 13:55:52,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208a2de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:52, skipping insertion in model container [2020-07-20 13:55:52,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:52" (3/3) ... [2020-07-20 13:55:52,163 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-07-20 13:55:52,174 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:55:52,182 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 13:55:52,198 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 13:55:52,226 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:55:52,227 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:55:52,227 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:55:52,227 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:55:52,228 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:55:52,228 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:55:52,228 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:55:52,228 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:55:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-07-20 13:55:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 13:55:52,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:52,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:52,262 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 13:55:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 11193106, now seen corresponding path program 1 times [2020-07-20 13:55:52,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:52,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304426524] [2020-07-20 13:55:52,281 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 13:55:52,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:55:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:52,539 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 13:55:52,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:52,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304426524] [2020-07-20 13:55:52,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:52,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:52,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114290641] [2020-07-20 13:55:52,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:52,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:52,568 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 3 states. [2020-07-20 13:55:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:52,647 INFO L93 Difference]: Finished difference Result 188 states and 306 transitions. [2020-07-20 13:55:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:52,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 13:55:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:52,662 INFO L225 Difference]: With dead ends: 188 [2020-07-20 13:55:52,662 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 13:55:52,667 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 13:55:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 13:55:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-07-20 13:55:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 13:55:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-07-20 13:55:52,716 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 8 [2020-07-20 13:55:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:52,716 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-07-20 13:55:52,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-07-20 13:55:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:52,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:52,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:52,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:52,932 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 13:55:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash -648207140, now seen corresponding path program 1 times [2020-07-20 13:55:52,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:52,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866984736] [2020-07-20 13:55:52,934 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 13:55:53,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:53,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:53,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:53,122 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 13:55:53,123 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,135 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:53,140 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 13:55:53,141 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,148 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:53,149 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,149 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:53,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:53,181 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:53,210 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 13:55:53,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:53,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866984736] [2020-07-20 13:55:53,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:53,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:53,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47146564] [2020-07-20 13:55:53,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:53,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:53,215 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 4 states. [2020-07-20 13:55:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:53,389 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2020-07-20 13:55:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:55:53,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 13:55:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:53,392 INFO L225 Difference]: With dead ends: 208 [2020-07-20 13:55:53,393 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 13:55:53,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 13:55:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 13:55:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 84. [2020-07-20 13:55:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 13:55:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-07-20 13:55:53,429 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-07-20 13:55:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:53,430 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-07-20 13:55:53,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-07-20 13:55:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:53,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:53,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:53,648 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 13:55:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -648205218, now seen corresponding path program 1 times [2020-07-20 13:55:53,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:53,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297193114] [2020-07-20 13:55:53,650 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 13:55:53,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:55:53,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:53,788 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 13:55:53,788 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,796 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:53,800 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 13:55:53,801 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,807 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:53,808 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:53,809 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:53,823 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:53,825 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:53,836 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 13:55:53,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:53,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297193114] [2020-07-20 13:55:53,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:53,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:53,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288129715] [2020-07-20 13:55:53,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:53,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:53,839 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 4 states. [2020-07-20 13:55:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:53,970 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2020-07-20 13:55:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:53,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 13:55:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:53,973 INFO L225 Difference]: With dead ends: 139 [2020-07-20 13:55:53,973 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 13:55:53,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 13:55:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 13:55:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 13:55:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 13:55:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-07-20 13:55:53,984 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 14 [2020-07-20 13:55:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:53,985 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-07-20 13:55:53,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-07-20 13:55:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:53,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:53,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:54,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:54,201 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 13:55:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash -646358176, now seen corresponding path program 1 times [2020-07-20 13:55:54,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:54,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724690353] [2020-07-20 13:55:54,203 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 13:55:54,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:55:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:55:54,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:54,339 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 13:55:54,340 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:54,347 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:54,347 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:54,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 13:55:54,385 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:54,385 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 13:55:54,386 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:54,411 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:54,415 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_36|], 8=[|v_#memory_$Pointer$.base_36|]} [2020-07-20 13:55:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:54,423 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:54,434 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:54,443 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 13:55:54,444 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:54,454 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:54,456 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 13:55:54,456 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-20 13:55:54,480 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:54,492 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 13:55:54,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:54,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724690353] [2020-07-20 13:55:54,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:54,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:54,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988157398] [2020-07-20 13:55:54,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:54,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:54,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:54,495 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 5 states. [2020-07-20 13:55:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:54,680 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2020-07-20 13:55:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:55:54,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:55:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:54,684 INFO L225 Difference]: With dead ends: 223 [2020-07-20 13:55:54,685 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 13:55:54,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:55:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 13:55:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-07-20 13:55:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 13:55:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-07-20 13:55:54,707 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-07-20 13:55:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:54,712 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-07-20 13:55:54,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-07-20 13:55:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:55:54,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:54,713 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 13:55:54,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:54,928 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 13:55:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash 283662425, now seen corresponding path program 1 times [2020-07-20 13:55:54,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:54,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683124756] [2020-07-20 13:55:54,930 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 13:55:55,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:55:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:55,046 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 13:55:55,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:55,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683124756] [2020-07-20 13:55:55,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:55,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:55,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685372681] [2020-07-20 13:55:55,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:55,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:55,049 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 3 states. [2020-07-20 13:55:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:55,093 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-07-20 13:55:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:55,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 13:55:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:55,095 INFO L225 Difference]: With dead ends: 85 [2020-07-20 13:55:55,095 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 13:55:55,096 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 13:55:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 13:55:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-20 13:55:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 13:55:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-20 13:55:55,103 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2020-07-20 13:55:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:55,103 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-20 13:55:55,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-20 13:55:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 13:55:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:55,105 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 13:55:55,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:55,321 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 13:55:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash 203604783, now seen corresponding path program 1 times [2020-07-20 13:55:55,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:55,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006364425] [2020-07-20 13:55:55,323 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 13:55:55,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:55:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:55,446 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 13:55:55,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:55,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006364425] [2020-07-20 13:55:55,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:55,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:55,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234531391] [2020-07-20 13:55:55,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:55,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:55,449 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 4 states. [2020-07-20 13:55:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:55,515 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-07-20 13:55:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:55:55,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 13:55:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:55,517 INFO L225 Difference]: With dead ends: 138 [2020-07-20 13:55:55,517 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 13:55:55,518 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 13:55:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 13:55:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2020-07-20 13:55:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 13:55:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-07-20 13:55:55,524 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 20 [2020-07-20 13:55:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:55,524 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-07-20 13:55:55,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-07-20 13:55:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:55:55,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:55,526 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 13:55:55,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:55,739 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 13:55:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash -249563430, now seen corresponding path program 1 times [2020-07-20 13:55:55,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:55,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035551817] [2020-07-20 13:55:55,740 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 13:55:55,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 13:55:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:55,843 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 13:55:55,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:55,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035551817] [2020-07-20 13:55:55,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:55,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:55,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152538086] [2020-07-20 13:55:55,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:55,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:55,846 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 3 states. [2020-07-20 13:55:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:55,860 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-07-20 13:55:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:55,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:55:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:55,862 INFO L225 Difference]: With dead ends: 103 [2020-07-20 13:55:55,862 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 13:55:55,863 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 13:55:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 13:55:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-07-20 13:55:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 13:55:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-07-20 13:55:55,869 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-07-20 13:55:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:55,869 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-07-20 13:55:55,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-07-20 13:55:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:55:55,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:55,870 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 13:55:56,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:56,084 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 13:55:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 853457808, now seen corresponding path program 1 times [2020-07-20 13:55:56,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:56,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898210347] [2020-07-20 13:55:56,086 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 13:55:56,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:55:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:56,186 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 13:55:56,187 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:56,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:56,195 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 13:55:56,196 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:56,200 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:56,201 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:56,201 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:56,236 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 13:55:56,237 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:56,243 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:56,246 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 13:55:56,247 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:56,251 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:56,251 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 13:55:56,251 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 13:55:56,261 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 13:55:56,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:56,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898210347] [2020-07-20 13:55:56,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:56,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:56,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686248281] [2020-07-20 13:55:56,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:56,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:56,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:56,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:56,264 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 5 states. [2020-07-20 13:55:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:56,443 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-07-20 13:55:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:55:56,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-20 13:55:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:56,445 INFO L225 Difference]: With dead ends: 189 [2020-07-20 13:55:56,445 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 13:55:56,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 13:55:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 13:55:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 89. [2020-07-20 13:55:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-20 13:55:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2020-07-20 13:55:56,453 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 25 [2020-07-20 13:55:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:56,453 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2020-07-20 13:55:56,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2020-07-20 13:55:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:55:56,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:56,454 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 13:55:56,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:56,668 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 13:55:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash 843506704, now seen corresponding path program 1 times [2020-07-20 13:55:56,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:56,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538233432] [2020-07-20 13:55:56,670 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 13:55:56,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:56,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:56,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 13:55:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:56,795 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 13:55:56,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:56,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538233432] [2020-07-20 13:55:56,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:56,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:55:56,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561269908] [2020-07-20 13:55:56,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:55:56,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:56,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:55:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:55:56,798 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand 3 states. [2020-07-20 13:55:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:56,817 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-07-20 13:55:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:55:56,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:55:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:56,819 INFO L225 Difference]: With dead ends: 89 [2020-07-20 13:55:56,819 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 13:55:56,820 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 13:55:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 13:55:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-20 13:55:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 13:55:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-07-20 13:55:56,826 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 25 [2020-07-20 13:55:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:56,827 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-07-20 13:55:56,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:55:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-07-20 13:55:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:55:56,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:56,828 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 13:55:57,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:57,043 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 13:55:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1681365399, now seen corresponding path program 1 times [2020-07-20 13:55:57,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:57,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867747191] [2020-07-20 13:55:57,044 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 13:55:57,174 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:55:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:55:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:57,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 13:55:57,185 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,196 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 13:55:57,196 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,211 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,212 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,212 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:57,228 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:57,229 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 13:55:57,241 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 13:55:57,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867747191] [2020-07-20 13:55:57,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:57,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:57,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575950173] [2020-07-20 13:55:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:57,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:57,246 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 4 states. [2020-07-20 13:55:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:57,349 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-07-20 13:55:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:57,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 13:55:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:57,350 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:55:57,351 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:55:57,351 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 13:55:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:55:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-07-20 13:55:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 13:55:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2020-07-20 13:55:57,359 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 27 [2020-07-20 13:55:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:57,360 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2020-07-20 13:55:57,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2020-07-20 13:55:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:55:57,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:57,363 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 13:55:57,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:57,564 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 13:55:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1679518357, now seen corresponding path program 1 times [2020-07-20 13:55:57,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:57,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775442228] [2020-07-20 13:55:57,566 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 13:55:57,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:55:57,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 13:55:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:57,674 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 13:55:57,674 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,676 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,676 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,677 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 13:55:57,710 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,710 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 13:55:57,711 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,724 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,726 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_39|], 8=[|v_#memory_$Pointer$.base_39|]} [2020-07-20 13:55:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:57,730 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,743 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:57,761 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 13:55:57,762 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 13:55:57,762 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:57,773 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:57,775 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 13:55:57,776 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 13:55:57,818 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 13:55:57,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:57,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775442228] [2020-07-20 13:55:57,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:57,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:55:57,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313058405] [2020-07-20 13:55:57,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:55:57,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:55:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:55:57,821 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 5 states. [2020-07-20 13:55:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:57,994 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2020-07-20 13:55:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:57,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 13:55:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:57,996 INFO L225 Difference]: With dead ends: 158 [2020-07-20 13:55:57,999 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:55:58,000 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 13:55:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:55:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-20 13:55:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-20 13:55:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-07-20 13:55:58,007 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 27 [2020-07-20 13:55:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:58,007 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-07-20 13:55:58,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:55:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-07-20 13:55:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 13:55:58,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:58,011 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 13:55:58,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:58,212 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 13:55:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -941335665, now seen corresponding path program 1 times [2020-07-20 13:55:58,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:58,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094841912] [2020-07-20 13:55:58,214 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 13:55:58,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:55:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:55:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:58,362 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 13:55:58,362 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,366 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,366 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:55:58,394 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,394 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 13:55:58,395 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,435 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:58,461 INFO L350 Elim1Store]: treesize reduction 89, result has 7.3 percent of original size [2020-07-20 13:55:58,461 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 13:55:58,462 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,490 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:55:58,501 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 13:55:58,501 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,516 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,518 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 13:55:58,518 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 13:55:58,620 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 13:55:58,634 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 13:55:58,634 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 13:55:58,637 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:58,638 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:55:58,639 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 13:55:58,678 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-20 13:55:58,697 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,698 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 13:55:58,699 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:58,706 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:58,707 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 13:55:58,708 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-20 13:55:58,727 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 13:55:58,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:58,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094841912] [2020-07-20 13:55:58,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:58,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:55:58,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451384817] [2020-07-20 13:55:58,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:55:58,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:55:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:55:58,729 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 7 states. [2020-07-20 13:55:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:59,450 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2020-07-20 13:55:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:55:59,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 13:55:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:59,453 INFO L225 Difference]: With dead ends: 231 [2020-07-20 13:55:59,453 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 13:55:59,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:55:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 13:55:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 99. [2020-07-20 13:55:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 13:55:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-07-20 13:55:59,463 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 28 [2020-07-20 13:55:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:59,464 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-07-20 13:55:59,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:55:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-07-20 13:55:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:55:59,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:59,467 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 13:55:59,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:59,668 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 13:55:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1932526751, now seen corresponding path program 1 times [2020-07-20 13:55:59,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:59,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41505410] [2020-07-20 13:55:59,670 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 13:55:59,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:55:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:59,784 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 13:55:59,784 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:59,796 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:59,801 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 13:55:59,801 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:59,809 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:59,810 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:55:59,810 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 13:55:59,834 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 13:55:59,835 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:59,841 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:59,843 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 13:55:59,844 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:55:59,848 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:55:59,848 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 13:55:59,848 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 13:55:59,866 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 13:55:59,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:59,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41505410] [2020-07-20 13:55:59,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:59,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:59,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352492369] [2020-07-20 13:55:59,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:59,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:59,869 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 4 states. [2020-07-20 13:55:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:59,968 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-07-20 13:55:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:55:59,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-07-20 13:55:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:59,970 INFO L225 Difference]: With dead ends: 145 [2020-07-20 13:55:59,970 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 13:55:59,971 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 13:55:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 13:55:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-07-20 13:55:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 13:55:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-07-20 13:55:59,979 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 30 [2020-07-20 13:55:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:59,980 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-07-20 13:55:59,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-07-20 13:55:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 13:55:59,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:59,981 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 13:56:00,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:00,192 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 13:56:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash -250794977, now seen corresponding path program 1 times [2020-07-20 13:56:00,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:00,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528181012] [2020-07-20 13:56:00,193 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 13:56:00,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 13:56:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:00,306 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 13:56:00,306 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,309 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,310 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,310 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:56:00,338 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,338 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 13:56:00,339 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,355 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,356 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_42|], 8=[|v_#memory_$Pointer$.base_42|]} [2020-07-20 13:56:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:00,358 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:00,373 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 13:56:00,374 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,395 INFO L624 ElimStorePlain]: treesize reduction 4, result has 88.6 percent of original size [2020-07-20 13:56:00,396 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 13:56:00,396 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:189, output treesize:40 [2020-07-20 13:56:00,442 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,443 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 13:56:00,444 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,454 INFO L624 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2020-07-20 13:56:00,455 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 13:56:00,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:4 [2020-07-20 13:56:00,465 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 13:56:00,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:00,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528181012] [2020-07-20 13:56:00,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:00,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:56:00,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030994130] [2020-07-20 13:56:00,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:56:00,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:56:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:56:00,467 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 6 states. [2020-07-20 13:56:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:00,812 INFO L93 Difference]: Finished difference Result 256 states and 295 transitions. [2020-07-20 13:56:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:56:00,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 13:56:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:00,819 INFO L225 Difference]: With dead ends: 256 [2020-07-20 13:56:00,819 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 13:56:00,820 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 13:56:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 13:56:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 119. [2020-07-20 13:56:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-20 13:56:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-07-20 13:56:00,829 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 30 [2020-07-20 13:56:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:00,830 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-07-20 13:56:00,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:56:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-07-20 13:56:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 13:56:00,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:00,831 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 13:56:01,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:01,038 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 13:56:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1485208190, now seen corresponding path program 1 times [2020-07-20 13:56:01,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:01,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460497517] [2020-07-20 13:56:01,039 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 13:56:01,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:01,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:56:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:01,148 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 13:56:01,149 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,153 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,154 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,154 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-20 13:56:01,184 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,184 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 13:56:01,185 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,219 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:01,225 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 13:56:01,237 INFO L350 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2020-07-20 13:56:01,238 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 271 treesize of output 193 [2020-07-20 13:56:01,238 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,256 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:01,277 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 13:56:01,278 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,296 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,297 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 13:56:01,297 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-20 13:56:01,392 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,392 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 13:56:01,394 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:56:01,396 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 13:56:01,397 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 13:56:01,421 INFO L624 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2020-07-20 13:56:01,433 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,434 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 13:56:01,435 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,442 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,443 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 13:56:01,443 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:90, output treesize:7 [2020-07-20 13:56:01,466 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 13:56:01,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:01,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460497517] [2020-07-20 13:56:01,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:01,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 13:56:01,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086298811] [2020-07-20 13:56:01,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:56:01,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:56:01,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:56:01,467 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 7 states. [2020-07-20 13:56:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:02,033 INFO L93 Difference]: Finished difference Result 208 states and 239 transitions. [2020-07-20 13:56:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:56:02,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-20 13:56:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:02,035 INFO L225 Difference]: With dead ends: 208 [2020-07-20 13:56:02,035 INFO L226 Difference]: Without dead ends: 206 [2020-07-20 13:56:02,036 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 13:56:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-20 13:56:02,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 122. [2020-07-20 13:56:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 13:56:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-07-20 13:56:02,045 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 31 [2020-07-20 13:56:02,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:02,045 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-07-20 13:56:02,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:56:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-07-20 13:56:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 13:56:02,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:02,046 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 13:56:02,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:02,260 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 13:56:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash -451387212, now seen corresponding path program 1 times [2020-07-20 13:56:02,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:02,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796755264] [2020-07-20 13:56:02,261 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 13:56:02,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:56:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:56:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:02,355 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 13:56:02,356 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,361 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,364 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 13:56:02,364 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,369 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,369 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2020-07-20 13:56:02,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:02,382 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 13:56:02,383 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,394 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:02,401 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 13:56:02,402 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,410 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,411 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,411 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2020-07-20 13:56:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:02,434 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 13:56:02,435 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,443 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,446 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 13:56:02,447 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 13:56:02,448 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,452 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,452 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 13:56:02,452 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:47, output treesize:7 [2020-07-20 13:56:02,466 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 13:56:02,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:56:02,492 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 13:56:02,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796755264] [2020-07-20 13:56:02,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:56:02,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2020-07-20 13:56:02,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241441162] [2020-07-20 13:56:02,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:56:02,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:56:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:56:02,494 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 5 states. [2020-07-20 13:56:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:02,610 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2020-07-20 13:56:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:56:02,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-20 13:56:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:02,612 INFO L225 Difference]: With dead ends: 190 [2020-07-20 13:56:02,612 INFO L226 Difference]: Without dead ends: 165 [2020-07-20 13:56:02,613 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 13:56:02,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-20 13:56:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2020-07-20 13:56:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 13:56:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-07-20 13:56:02,624 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 33 [2020-07-20 13:56:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:02,624 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-07-20 13:56:02,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:56:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-07-20 13:56:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 13:56:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:02,625 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 13:56:02,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:02,840 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 13:56:02,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1679328926, now seen corresponding path program 1 times [2020-07-20 13:56:02,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:02,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372378286] [2020-07-20 13:56:02,842 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 13:56:02,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:02,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:56:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:02,963 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 13:56:02,963 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,970 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,974 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 13:56:02,974 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,980 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:02,981 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:02,981 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-20 13:56:02,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:02,994 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 13:56:02,994 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,005 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:03,011 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 13:56:03,012 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,026 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,027 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,027 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:36 [2020-07-20 13:56:03,073 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 13:56:03,074 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,081 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,084 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,085 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 13:56:03,085 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,095 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,095 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 13:56:03,095 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2020-07-20 13:56:03,111 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 13:56:03,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:56:03,168 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 13:56:03,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372378286] [2020-07-20 13:56:03,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:56:03,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 13:56:03,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870841963] [2020-07-20 13:56:03,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 13:56:03,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 13:56:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:56:03,170 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 8 states. [2020-07-20 13:56:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:03,474 INFO L93 Difference]: Finished difference Result 201 states and 228 transitions. [2020-07-20 13:56:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:56:03,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-20 13:56:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:03,475 INFO L225 Difference]: With dead ends: 201 [2020-07-20 13:56:03,476 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 13:56:03,476 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 13:56:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 13:56:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2020-07-20 13:56:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 13:56:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2020-07-20 13:56:03,485 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 33 [2020-07-20 13:56:03,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:03,486 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2020-07-20 13:56:03,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 13:56:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2020-07-20 13:56:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 13:56:03,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:03,487 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 13:56:03,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:03,688 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 13:56:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash -620993698, now seen corresponding path program 1 times [2020-07-20 13:56:03,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:03,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314855719] [2020-07-20 13:56:03,689 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 13:56:03,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:56:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 13:56:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:03,804 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 13:56:03,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:03,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314855719] [2020-07-20 13:56:03,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:03,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:56:03,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926748457] [2020-07-20 13:56:03,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:56:03,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:03,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:56:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:56:03,806 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand 3 states. [2020-07-20 13:56:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:03,827 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2020-07-20 13:56:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:56:03,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 13:56:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:03,828 INFO L225 Difference]: With dead ends: 161 [2020-07-20 13:56:03,828 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 13:56:03,829 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 13:56:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 13:56:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2020-07-20 13:56:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-07-20 13:56:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2020-07-20 13:56:03,842 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 36 [2020-07-20 13:56:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:03,843 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2020-07-20 13:56:03,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:56:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2020-07-20 13:56:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 13:56:03,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:03,844 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 13:56:04,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:04,058 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 13:56:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:04,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1632051366, now seen corresponding path program 1 times [2020-07-20 13:56:04,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:04,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59585768] [2020-07-20 13:56:04,059 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 13:56:04,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:56:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:04,160 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 13:56:04,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:04,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59585768] [2020-07-20 13:56:04,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:04,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:56:04,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434989162] [2020-07-20 13:56:04,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:56:04,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:56:04,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:56:04,162 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand 3 states. [2020-07-20 13:56:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:04,178 INFO L93 Difference]: Finished difference Result 264 states and 316 transitions. [2020-07-20 13:56:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:56:04,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 13:56:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:04,180 INFO L225 Difference]: With dead ends: 264 [2020-07-20 13:56:04,180 INFO L226 Difference]: Without dead ends: 168 [2020-07-20 13:56:04,181 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 13:56:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-20 13:56:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2020-07-20 13:56:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 13:56:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2020-07-20 13:56:04,189 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 36 [2020-07-20 13:56:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:04,190 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2020-07-20 13:56:04,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:56:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2020-07-20 13:56:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:56:04,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:04,191 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 13:56:04,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:04,392 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 13:56:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash -366933706, now seen corresponding path program 1 times [2020-07-20 13:56:04,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:04,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574644436] [2020-07-20 13:56:04,394 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 13:56:04,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:56:04,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 13:56:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:04,541 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 13:56:04,542 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,543 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,543 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 13:56:04,552 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 13:56:04,553 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,566 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,570 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 13:56:04,571 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,576 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,577 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,577 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:24 [2020-07-20 13:56:04,620 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,620 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 13:56:04,621 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,645 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:04,653 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 13:56:04,654 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,670 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:04,674 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 13:56:04,675 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,691 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,693 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 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 13:56:04,693 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:86, output treesize:54 [2020-07-20 13:56:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:04,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:04,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 50 [2020-07-20 13:56:04,754 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,778 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:04,863 INFO L350 Elim1Store]: treesize reduction 46, result has 65.2 percent of original size [2020-07-20 13:56:04,864 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 13:56:04,867 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-07-20 13:56:04,868 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-07-20 13:56:04,868 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:04,917 INFO L624 ElimStorePlain]: treesize reduction 64, result has 57.0 percent of original size [2020-07-20 13:56:04,920 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 13:56:04,920 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:101, output treesize:85 [2020-07-20 13:56:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:07,094 INFO L350 Elim1Store]: treesize reduction 10, result has 85.1 percent of original size [2020-07-20 13:56:07,095 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 5 case distinctions, treesize of input 75 treesize of output 92 [2020-07-20 13:56:07,097 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 13:56:07,097 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 13:56:07,098 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 13:56:07,099 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 13:56:07,101 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 13:56:07,102 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 13:56:07,102 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 13:56:07,103 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 13:56:07,104 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 13:56:07,146 INFO L624 ElimStorePlain]: treesize reduction 56, result has 48.1 percent of original size [2020-07-20 13:56:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:07,152 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-20 13:56:07,153 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 16 [2020-07-20 13:56:07,153 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:07,162 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:07,162 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 13:56:07,163 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:103, output treesize:7 [2020-07-20 13:56:07,193 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 13:56:07,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:56:07,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:56:09,269 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:56:09,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:56:15,517 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 13:56:34,389 WARN L193 SmtUtils]: Spent 12.13 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 13:56:36,687 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 13:56:36,690 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:36,694 INFO L624 ElimStorePlain]: treesize reduction 57, result has 1.7 percent of original size [2020-07-20 13:56:36,694 INFO L512 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2020-07-20 13:56:36,694 INFO L544 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:36,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:117, output treesize:1 [2020-07-20 13:56:36,707 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 13:56:36,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574644436] [2020-07-20 13:56:36,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:56:36,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 13:56:36,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159618136] [2020-07-20 13:56:36,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:56:36,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:56:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=154, Unknown=3, NotChecked=0, Total=210 [2020-07-20 13:56:36,709 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand 15 states. [2020-07-20 13:56:49,032 WARN L193 SmtUtils]: Spent 12.12 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 13:57:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:57:17,246 INFO L93 Difference]: Finished difference Result 422 states and 499 transitions. [2020-07-20 13:57:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 13:57:17,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-07-20 13:57:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:57:17,252 INFO L225 Difference]: With dead ends: 422 [2020-07-20 13:57:17,252 INFO L226 Difference]: Without dead ends: 368 [2020-07-20 13:57:17,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=295, Invalid=822, Unknown=5, NotChecked=0, Total=1122 [2020-07-20 13:57:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-07-20 13:57:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 171. [2020-07-20 13:57:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 13:57:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions. [2020-07-20 13:57:17,271 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 40 [2020-07-20 13:57:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:57:17,272 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 202 transitions. [2020-07-20 13:57:17,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:57:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions. [2020-07-20 13:57:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:57:17,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:57:17,273 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 13:57:17,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:57:17,489 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 13:57:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:57:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1659756179, now seen corresponding path program 1 times [2020-07-20 13:57:17,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:57:17,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189691458] [2020-07-20 13:57:17,490 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 13:57:17,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:57:17,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:57:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 13:57:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:57:17,600 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 13:57:17,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:57:17,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189691458] [2020-07-20 13:57:17,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:57:17,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:57:17,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957946065] [2020-07-20 13:57:17,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:57:17,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:57:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:57:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:57:17,602 INFO L87 Difference]: Start difference. First operand 171 states and 202 transitions. Second operand 3 states. [2020-07-20 13:57:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:57:17,629 INFO L93 Difference]: Finished difference Result 277 states and 330 transitions. [2020-07-20 13:57:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:57:17,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-07-20 13:57:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:57:17,631 INFO L225 Difference]: With dead ends: 277 [2020-07-20 13:57:17,631 INFO L226 Difference]: Without dead ends: 186 [2020-07-20 13:57:17,632 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 13:57:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-20 13:57:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 164. [2020-07-20 13:57:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 13:57:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2020-07-20 13:57:17,643 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 40 [2020-07-20 13:57:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:57:17,644 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2020-07-20 13:57:17,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:57:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2020-07-20 13:57:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 13:57:17,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:57:17,645 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 13:57:17,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:57:17,857 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 13:57:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:57:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1717014481, now seen corresponding path program 1 times [2020-07-20 13:57:17,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:57:17,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128503191] [2020-07-20 13:57:17,858 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 13:57:17,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:57:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:57:17,988 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:57:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:57:18,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:57:18,045 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:57:18,045 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:57:18,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:57:18,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:57:18 BoogieIcfgContainer [2020-07-20 13:57:18,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:57:18,310 INFO L168 Benchmark]: Toolchain (without parser) took 87683.98 ms. Allocated memory was 146.3 MB in the beginning and 344.5 MB in the end (delta: 198.2 MB). Free memory was 102.9 MB in the beginning and 311.4 MB in the end (delta: -208.5 MB). Peak memory consumption was 207.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,311 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 691.13 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.5 MB in the beginning and 172.4 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,312 INFO L168 Benchmark]: Boogie Preprocessor took 75.68 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 169.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,312 INFO L168 Benchmark]: RCFGBuilder took 757.36 ms. Allocated memory is still 204.5 MB. Free memory was 169.0 MB in the beginning and 112.9 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,313 INFO L168 Benchmark]: TraceAbstraction took 86153.07 ms. Allocated memory was 204.5 MB in the beginning and 344.5 MB in the end (delta: 140.0 MB). Free memory was 112.3 MB in the beginning and 311.4 MB in the end (delta: -199.2 MB). Peak memory consumption was 159.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:57:18,314 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 691.13 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.5 MB in the beginning and 172.4 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.68 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 169.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 757.36 ms. Allocated memory is still 204.5 MB. Free memory was 169.0 MB in the beginning and 112.9 MB in the end (delta: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 86153.07 ms. Allocated memory was 204.5 MB in the beginning and 344.5 MB in the end (delta: 140.0 MB). Free memory was 112.3 MB in the beginning and 311.4 MB in the end (delta: -199.2 MB). Peak memory consumption was 159.1 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={12619:0}, malloc(sizeof(SLL))={12619:0}] [L993] COND FALSE !(!(list != ((void*)0))) VAL [list={12619:0}, malloc(sizeof(SLL))={12619:0}] [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={12619:0}, list->inner={12618:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L993] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L995] SLL* end = list; VAL [end={12619:0}, list={12619:0}, malloc(sizeof(SLL))={12618:0}, malloc(sizeof(SLL))={12619:0}] [L998] COND FALSE !(__VERIFIER_nondet_int()) [L1008] end = ((void*)0) [L1009] end = list VAL [end={12619:0}, list={12619:0}, malloc(sizeof(SLL))={12618:0}, malloc(sizeof(SLL))={12619:0}] [L1012] COND FALSE !(!(((void*)0) != end)) VAL [end={12619:0}, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [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={12619:0}, inner={12618:0}, len=0, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L1020] COND TRUE len == 0 [L1021] len = 1 VAL [end={12619:0}, inner={12618:0}, len=1, list={12619:0}, malloc(sizeof(SLL))={12618:0}, malloc(sizeof(SLL))={12619:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={12619:0}, inner={12618:0}, len=1, list={12619:0}, malloc(sizeof(SLL))={12618:0}, malloc(sizeof(SLL))={12619:0}] [L1025] EXPR inner->inner VAL [end={12619:0}, inner={12618:0}, inner->inner={0:0}, len=1, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L1025] COND FALSE !(!(((void*)0) == inner->inner)) [L1026] EXPR inner->next VAL [end={12619:0}, inner={12618:0}, inner->next={0:0}, len=1, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [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={12619:0}, inner={12618:-5}, len=1, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L1020] COND FALSE !(len == 0) [L1023] len = 2 VAL [end={12619:0}, inner={12618:-5}, len=2, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L1024] COND FALSE !(!(((void*)0) != inner)) VAL [end={12619:0}, inner={12618:-5}, len=2, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] [L1025] EXPR inner->inner VAL [end={12619:0}, inner={12618:-5}, inner->inner={14:13}, len=2, list={12619:0}, malloc(sizeof(SLL))={12618:0}, malloc(sizeof(SLL))={12619:0}] [L1025] COND TRUE !(((void*)0) == inner->inner) [L1025] __VERIFIER_error() VAL [end={12619:0}, inner={12618:-5}, len=2, list={12619:0}, malloc(sizeof(SLL))={12619:0}, malloc(sizeof(SLL))={12618:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 89 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 86.0s, OverallIterations: 22, TraceHistogramMax: 2, AutomataDifference: 44.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1793 SDtfs, 2425 SDslu, 3474 SDs, 0 SdLazy, 1699 SolverSat, 206 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 24.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 688 GetRequests, 572 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 50.2s 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, 927 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 34.4s InterpolantComputationTime, 594 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 636 ConstructedInterpolants, 38 QuantifiedInterpolants, 286254 SizeOfPredicates, 123 NumberOfNonLiveVariables, 1647 ConjunctsInSsa, 237 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...