/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 BIGGEST_EQUIVALENCE_CLASS --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/dll-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:14:55,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:14:55,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:14:55,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:14:55,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:14:55,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:14:55,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:14:55,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:14:55,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:14:55,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:14:55,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:14:55,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:14:55,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:14:55,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:14:55,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:14:55,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:14:55,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:14:55,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:14:55,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:14:55,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:14:55,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:14:55,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:14:55,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:14:55,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:14:55,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:14:55,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:14:55,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:14:55,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:14:55,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:14:55,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:14:55,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:14:55,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:14:55,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:14:55,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:14:55,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:14:55,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:14:55,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:14:55,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:14:55,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:14:55,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:14:55,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:14:55,285 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 [2020-07-21 01:14:55,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:14:55,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:14:55,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:14:55,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:14:55,313 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:14:55,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:14:55,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:14:55,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:14:55,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:14:55,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:14:55,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:14:55,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:14:55,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:14:55,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:14:55,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:14:55,317 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:14:55,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:14:55,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:14:55,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:14:55,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:14:55,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:14:55,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:14:55,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:14:55,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:14:55,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:14:55,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:14:55,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:55,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:14:55,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:14:55,320 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:14:55,624 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:14:55,637 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:14:55,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:14:55,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:14:55,643 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:14:55,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 01:14:55,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f18a72a6/5f987e60011e439481c1086886be595d/FLAGb521b4928 [2020-07-21 01:14:56,291 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:14:56,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 01:14:56,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f18a72a6/5f987e60011e439481c1086886be595d/FLAGb521b4928 [2020-07-21 01:14:56,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f18a72a6/5f987e60011e439481c1086886be595d [2020-07-21 01:14:56,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:14:56,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:14:56,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:14:56,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:14:56,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:14:56,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:56" (1/1) ... [2020-07-21 01:14:56,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f295597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:56, skipping insertion in model container [2020-07-21 01:14:56,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:56" (1/1) ... [2020-07-21 01:14:56,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:14:56,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:14:57,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:14:57,089 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:14:57,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:14:57,216 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:14:57,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57 WrapperNode [2020-07-21 01:14:57,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:14:57,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:14:57,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:14:57,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:14:57,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (1/1) ... [2020-07-21 01:14:57,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:14:57,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:14:57,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:14:57,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:14:57,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (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 [2020-07-21 01:14:57,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:14:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:14:57,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:14:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:14:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:14:57,354 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:14:57,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:14:57,356 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:14:57,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:14:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:14:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:14:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:14:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:14:57,362 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:14:57,363 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:14:57,364 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:14:57,365 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:14:57,366 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:14:57,367 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:14:57,368 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:14:57,369 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:14:57,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:14:57,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:14:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:14:57,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:14:57,978 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:14:57,979 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-07-21 01:14:57,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:57 BoogieIcfgContainer [2020-07-21 01:14:57,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:14:57,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:14:57,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:14:57,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:14:57,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:14:56" (1/3) ... [2020-07-21 01:14:57,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671245b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:57, skipping insertion in model container [2020-07-21 01:14:57,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:57" (2/3) ... [2020-07-21 01:14:57,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671245b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:57, skipping insertion in model container [2020-07-21 01:14:57,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:57" (3/3) ... [2020-07-21 01:14:57,991 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-07-21 01:14:58,001 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:14:58,009 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-21 01:14:58,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-21 01:14:58,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:14:58,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:14:58,044 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:14:58,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:14:58,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:14:58,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:14:58,045 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:14:58,045 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:14:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-07-21 01:14:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:14:58,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:58,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:58,072 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-07-21 01:14:58,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:58,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135518530] [2020-07-21 01:14:58,087 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 [2020-07-21 01:14:58,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:14:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:14:58,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:58,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:58,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135518530] [2020-07-21 01:14:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:58,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:14:58,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032643738] [2020-07-21 01:14:58,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:14:58,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:14:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:14:58,338 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2020-07-21 01:14:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:58,366 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-07-21 01:14:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:14:58,368 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 01:14:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:58,378 INFO L225 Difference]: With dead ends: 92 [2020-07-21 01:14:58,379 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 01:14:58,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:14:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 01:14:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 01:14:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 01:14:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-21 01:14:58,425 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-07-21 01:14:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:58,426 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-21 01:14:58,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:14:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-21 01:14:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:14:58,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:58,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:58,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:58,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-07-21 01:14:58,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:58,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637215447] [2020-07-21 01:14:58,646 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 [2020-07-21 01:14:58,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:14:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:14:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:58,810 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 [2020-07-21 01:14:58,810 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:58,822 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:58,822 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:58,823 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 01:14:58,869 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:58,870 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 [2020-07-21 01:14:58,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:58,875 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:58,884 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:58,890 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:58,896 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:58,898 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:58,899 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 01:14:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:58,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:58,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637215447] [2020-07-21 01:14:58,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:58,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:58,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833521669] [2020-07-21 01:14:58,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:58,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:58,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:58,908 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-07-21 01:14:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:58,993 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-21 01:14:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:14:58,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 01:14:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:58,995 INFO L225 Difference]: With dead ends: 43 [2020-07-21 01:14:58,995 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 01:14:58,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 01:14:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 01:14:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:14:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-21 01:14:59,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-07-21 01:14:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:59,005 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-21 01:14:59,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-21 01:14:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:14:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:59,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:59,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:59,221 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:59,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-07-21 01:14:59,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:59,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051180551] [2020-07-21 01:14:59,223 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 [2020-07-21 01:14:59,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:59,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:14:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:59,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:59,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051180551] [2020-07-21 01:14:59,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:59,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:59,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777820296] [2020-07-21 01:14:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:59,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:59,418 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-07-21 01:14:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:59,524 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-21 01:14:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:14:59,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 01:14:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:59,527 INFO L225 Difference]: With dead ends: 67 [2020-07-21 01:14:59,527 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 01:14:59,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 01:14:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-07-21 01:14:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 01:14:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-21 01:14:59,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-07-21 01:14:59,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:59,541 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-21 01:14:59,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-21 01:14:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:14:59,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:59,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:59,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:59,758 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-07-21 01:14:59,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:59,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375151781] [2020-07-21 01:14:59,761 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 [2020-07-21 01:14:59,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:59,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:14:59,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:59,944 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 [2020-07-21 01:14:59,945 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:59,946 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:59,946 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:59,947 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 01:14:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:59,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:59,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375151781] [2020-07-21 01:14:59,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:59,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:14:59,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786196166] [2020-07-21 01:14:59,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:14:59,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:59,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:14:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:59,957 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-07-21 01:15:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:15:00,046 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 01:15:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:15:00,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 01:15:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:15:00,047 INFO L225 Difference]: With dead ends: 39 [2020-07-21 01:15:00,047 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 01:15:00,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:15:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 01:15:00,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 01:15:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 01:15:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-07-21 01:15:00,054 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 16 [2020-07-21 01:15:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:15:00,054 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-07-21 01:15:00,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:15:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-07-21 01:15:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:15:00,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:00,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:15:00,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:00,268 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -409960037, now seen corresponding path program 1 times [2020-07-21 01:15:00,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:00,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404270897] [2020-07-21 01:15:00,269 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 [2020-07-21 01:15:00,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:15:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:15:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 01:15:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:15:00,417 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 [2020-07-21 01:15:00,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,432 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,432 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 01:15:00,504 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,504 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 [2020-07-21 01:15:00,506 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:15:00,507 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,544 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,550 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_30|], 2=[|v_#memory_int_28|, |v_#memory_int_29|, |v_#memory_$Pointer$.offset_21|, |v_#memory_$Pointer$.base_22|]} [2020-07-21 01:15:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:15:00,569 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 20 treesize of output 9 [2020-07-21 01:15:00,570 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,599 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,605 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 01:15:00,625 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,719 INFO L350 Elim1Store]: treesize reduction 154, result has 52.9 percent of original size [2020-07-21 01:15:00,720 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 2 case distinctions, treesize of input 133 treesize of output 245 [2020-07-21 01:15:00,721 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,771 INFO L624 ElimStorePlain]: treesize reduction 154, result has 37.4 percent of original size [2020-07-21 01:15:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:15:00,778 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,790 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:15:00,793 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,802 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,805 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 01:15:00,805 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:153, output treesize:23 [2020-07-21 01:15:00,851 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 28 treesize of output 10 [2020-07-21 01:15:00,852 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,855 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:15:00,856 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:15:00,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-07-21 01:15:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:15:00,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:15:00,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404270897] [2020-07-21 01:15:00,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:15:00,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:15:00,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823649622] [2020-07-21 01:15:00,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:15:00,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:15:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:15:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:15:00,866 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-07-21 01:15:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:15:01,061 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-21 01:15:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:15:01,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 01:15:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:15:01,063 INFO L225 Difference]: With dead ends: 72 [2020-07-21 01:15:01,063 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 01:15:01,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:15:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 01:15:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 01:15:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 01:15:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-21 01:15:01,073 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 16 [2020-07-21 01:15:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:15:01,073 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-21 01:15:01,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:15:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-21 01:15:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:15:01,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:15:01,075 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] [2020-07-21 01:15:01,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:01,278 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:15:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:15:01,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1407314597, now seen corresponding path program 1 times [2020-07-21 01:15:01,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:15:01,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793060019] [2020-07-21 01:15:01,280 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 [2020-07-21 01:15:01,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:15:01,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:15:01,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:15:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:15:01,533 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:15:01,557 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:15:01,557 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:15:01,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:15:01,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:15:01 BoogieIcfgContainer [2020-07-21 01:15:01,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:15:01,790 INFO L168 Benchmark]: Toolchain (without parser) took 5216.21 ms. Allocated memory was 142.1 MB in the beginning and 255.9 MB in the end (delta: 113.8 MB). Free memory was 98.7 MB in the beginning and 86.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 126.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,791 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.42 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 98.3 MB in the beginning and 166.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,793 INFO L168 Benchmark]: Boogie Preprocessor took 68.55 ms. Allocated memory is still 199.2 MB. Free memory was 166.2 MB in the beginning and 162.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,794 INFO L168 Benchmark]: RCFGBuilder took 696.63 ms. Allocated memory is still 199.2 MB. Free memory was 162.5 MB in the beginning and 115.5 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,795 INFO L168 Benchmark]: TraceAbstraction took 3804.97 ms. Allocated memory was 199.2 MB in the beginning and 255.9 MB in the end (delta: 56.6 MB). Free memory was 114.7 MB in the beginning and 86.3 MB in the end (delta: 28.5 MB). Peak memory consumption was 85.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:15:01,798 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 637.42 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 98.3 MB in the beginning and 166.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.55 ms. Allocated memory is still 199.2 MB. Free memory was 166.2 MB in the beginning and 162.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 696.63 ms. Allocated memory is still 199.2 MB. Free memory was 162.5 MB in the beginning and 115.5 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3804.97 ms. Allocated memory was 199.2 MB in the beginning and 255.9 MB in the end (delta: 56.6 MB). Free memory was 114.7 MB in the beginning and 86.3 MB in the end (delta: 28.5 MB). Peak memory consumption was 85.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}] [L1019] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, x->data=1] [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, x->data=1] [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}, x->data=2] [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 91 SDslu, 232 SDs, 0 SdLazy, 139 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 83 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 58 ConstructedInterpolants, 3 QuantifiedInterpolants, 2806 SizeOfPredicates, 17 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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...