/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_VARIABLES --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-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:16:32,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:16:32,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:16:32,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:16:32,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:16:32,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:16:32,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:16:32,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:16:32,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:16:32,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:16:32,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:16:32,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:16:32,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:16:32,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:16:32,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:16:32,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:16:32,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:16:32,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:16:32,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:16:32,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:16:32,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:16:32,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:16:32,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:16:32,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:16:32,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:16:32,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:16:32,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:16:32,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:16:32,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:16:32,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:16:32,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:16:32,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:16:32,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:16:32,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:16:32,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:16:32,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:16:32,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:16:32,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:16:32,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:16:32,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:16:32,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:16:32,347 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 17:16:32,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:16:32,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:16:32,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:16:32,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:16:32,389 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:16:32,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:16:32,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:16:32,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:16:32,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:16:32,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:16:32,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:16:32,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:16:32,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:16:32,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:16:32,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:16:32,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:16:32,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:16:32,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:16:32,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:16:32,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:16:32,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:16:32,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:32,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:16:32,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:16:32,395 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_VARIABLES 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 17:16:32,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:16:32,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:16:32,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:16:32,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:16:32,695 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:16:32,696 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 17:16:32,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34fccf3d/8c049b3482f14fa1a4ba3b33cf4baf61/FLAGa4dc381cd [2020-07-20 17:16:33,323 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:16:33,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-20 17:16:33,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34fccf3d/8c049b3482f14fa1a4ba3b33cf4baf61/FLAGa4dc381cd [2020-07-20 17:16:33,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34fccf3d/8c049b3482f14fa1a4ba3b33cf4baf61 [2020-07-20 17:16:33,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:16:33,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:16:33,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:16:33,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:16:33,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:16:33,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:16:33" (1/1) ... [2020-07-20 17:16:33,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68339fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:33, skipping insertion in model container [2020-07-20 17:16:33,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:16:33" (1/1) ... [2020-07-20 17:16:33,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:16:33,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:16:34,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:16:34,142 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:16:34,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:16:34,270 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:16:34,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34 WrapperNode [2020-07-20 17:16:34,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:16:34,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:16:34,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:16:34,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:16:34,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (1/1) ... [2020-07-20 17:16:34,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:16:34,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:16:34,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:16:34,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:16:34,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (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 17:16:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:16:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:16:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:16:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:16:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:16:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:16:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:16:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:16:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:16:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:16:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:16:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:16:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:16:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:16:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:16:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:16:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:16:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:16:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:16:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:16:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:16:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:16:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:16:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:16:35,115 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:16:35,115 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-20 17:16:35,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:16:35 BoogieIcfgContainer [2020-07-20 17:16:35,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:16:35,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:16:35,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:16:35,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:16:35,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:16:33" (1/3) ... [2020-07-20 17:16:35,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee9a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:16:35, skipping insertion in model container [2020-07-20 17:16:35,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:16:34" (2/3) ... [2020-07-20 17:16:35,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee9a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:16:35, skipping insertion in model container [2020-07-20 17:16:35,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:16:35" (3/3) ... [2020-07-20 17:16:35,129 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-20 17:16:35,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:16:35,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-20 17:16:35,165 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-20 17:16:35,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:16:35,192 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:16:35,192 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:16:35,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:16:35,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:16:35,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:16:35,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:16:35,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:16:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-20 17:16:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 17:16:35,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:35,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:16:35,229 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 17:16:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-20 17:16:35,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:35,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621275678] [2020-07-20 17:16:35,247 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 17:16:35,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:35,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:16:35,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:35,455 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 17:16:35,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:35,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621275678] [2020-07-20 17:16:35,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:35,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:16:35,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632193499] [2020-07-20 17:16:35,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:16:35,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:16:35,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:16:35,482 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-20 17:16:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:35,552 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-20 17:16:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:16:35,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 17:16:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:35,565 INFO L225 Difference]: With dead ends: 186 [2020-07-20 17:16:35,565 INFO L226 Difference]: Without dead ends: 99 [2020-07-20 17:16:35,570 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 17:16:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-20 17:16:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-20 17:16:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 17:16:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-20 17:16:35,617 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-20 17:16:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:35,618 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-20 17:16:35,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:16:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-20 17:16:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:16:35,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:35,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:16:35,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:35,835 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 17:16:35,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-20 17:16:35,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:35,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923725666] [2020-07-20 17:16:35,837 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 17:16:35,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:16:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:16:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:36,006 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 17:16:36,007 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,016 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:36,020 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 17:16:36,021 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,027 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:36,028 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,028 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:16:36,050 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:36,052 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:36,066 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 17:16:36,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:36,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923725666] [2020-07-20 17:16:36,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:36,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:16:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457137703] [2020-07-20 17:16:36,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:16:36,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:16:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:16:36,071 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-07-20 17:16:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:36,204 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2020-07-20 17:16:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:16:36,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:16:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:36,207 INFO L225 Difference]: With dead ends: 205 [2020-07-20 17:16:36,207 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 17:16:36,209 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 17:16:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 17:16:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2020-07-20 17:16:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-20 17:16:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-07-20 17:16:36,222 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 14 [2020-07-20 17:16:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:36,223 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-07-20 17:16:36,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:16:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-07-20 17:16:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:16:36,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:36,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:16:36,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:36,440 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 17:16:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-20 17:16:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:36,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661032613] [2020-07-20 17:16:36,442 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 17:16:36,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:16:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:16:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:36,577 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 17:16:36,577 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,585 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:36,590 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 17:16:36,590 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,597 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:36,598 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:36,599 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:16:36,613 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:36,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:36,626 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 17:16:36,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:36,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661032613] [2020-07-20 17:16:36,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:36,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:16:36,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304725051] [2020-07-20 17:16:36,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:16:36,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:16:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:16:36,630 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 4 states. [2020-07-20 17:16:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:36,750 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-07-20 17:16:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:16:36,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 17:16:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:36,753 INFO L225 Difference]: With dead ends: 137 [2020-07-20 17:16:36,753 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 17:16:36,754 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 17:16:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 17:16:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2020-07-20 17:16:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 17:16:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-07-20 17:16:36,765 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2020-07-20 17:16:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:36,765 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-07-20 17:16:36,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:16:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-07-20 17:16:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:16:36,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:36,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:16:36,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:36,983 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 17:16:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:36,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-20 17:16:36,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:36,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300100125] [2020-07-20 17:16:36,985 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 17:16:37,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:16:37,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:16:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:37,097 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 17:16:37,097 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,099 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,100 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:16:37,136 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,137 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 17:16:37,138 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,160 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,164 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_37|], 8=[|v_#memory_$Pointer$.base_37|]} [2020-07-20 17:16:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:37,175 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,187 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:37,197 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 17:16:37,198 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,210 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,212 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 17:16:37,212 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:186, output treesize:47 [2020-07-20 17:16:37,236 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 17:16:37,249 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 17:16:37,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:37,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300100125] [2020-07-20 17:16:37,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:37,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:16:37,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926679481] [2020-07-20 17:16:37,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:16:37,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:37,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:16:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:16:37,254 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 5 states. [2020-07-20 17:16:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:37,428 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2020-07-20 17:16:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:16:37,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 17:16:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:37,432 INFO L225 Difference]: With dead ends: 220 [2020-07-20 17:16:37,432 INFO L226 Difference]: Without dead ends: 151 [2020-07-20 17:16:37,433 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 17:16:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-20 17:16:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2020-07-20 17:16:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 17:16:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-20 17:16:37,444 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 14 [2020-07-20 17:16:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:37,444 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-20 17:16:37,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:16:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-20 17:16:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 17:16:37,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:37,445 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 17:16:37,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:37,661 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 17:16:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-07-20 17:16:37,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:37,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341536462] [2020-07-20 17:16:37,663 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 17:16:37,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:37,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 17:16:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:37,781 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 17:16:37,781 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,784 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,784 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:16:37,815 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,816 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 17:16:37,817 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,825 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:37,830 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,837 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:37,838 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:37,839 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:46, output treesize:4 [2020-07-20 17:16:37,845 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 17:16:37,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:37,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341536462] [2020-07-20 17:16:37,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:37,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:16:37,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384604757] [2020-07-20 17:16:37,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:16:37,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:16:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:16:37,848 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 5 states. [2020-07-20 17:16:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:37,987 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-07-20 17:16:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:16:37,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 17:16:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:37,989 INFO L225 Difference]: With dead ends: 126 [2020-07-20 17:16:37,989 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 17:16:37,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 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 17:16:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 17:16:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-20 17:16:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:16:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-07-20 17:16:38,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 19 [2020-07-20 17:16:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:38,011 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-07-20 17:16:38,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:16:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-07-20 17:16:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:16:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:38,017 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 17:16:38,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:38,218 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 17:16:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-07-20 17:16:38,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:38,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944858905] [2020-07-20 17:16:38,220 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 17:16:38,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:38,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:16:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:38,334 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 17:16:38,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:38,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944858905] [2020-07-20 17:16:38,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:38,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:16:38,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835510171] [2020-07-20 17:16:38,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:16:38,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:16:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:16:38,337 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 4 states. [2020-07-20 17:16:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:38,411 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-07-20 17:16:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:16:38,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 17:16:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:38,413 INFO L225 Difference]: With dead ends: 136 [2020-07-20 17:16:38,413 INFO L226 Difference]: Without dead ends: 116 [2020-07-20 17:16:38,413 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 17:16:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-20 17:16:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-20 17:16:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 17:16:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-07-20 17:16:38,420 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 20 [2020-07-20 17:16:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:38,420 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-07-20 17:16:38,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:16:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-07-20 17:16:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:16:38,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:38,422 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 17:16:38,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:38,637 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 17:16:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-07-20 17:16:38,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:38,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835358064] [2020-07-20 17:16:38,640 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 17:16:38,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:16:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:38,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:16:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:38,754 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 17:16:38,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:38,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835358064] [2020-07-20 17:16:38,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:38,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:16:38,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555875370] [2020-07-20 17:16:38,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:16:38,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:16:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:16:38,757 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 3 states. [2020-07-20 17:16:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:38,768 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-07-20 17:16:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:16:38,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 17:16:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:38,770 INFO L225 Difference]: With dead ends: 102 [2020-07-20 17:16:38,770 INFO L226 Difference]: Without dead ends: 100 [2020-07-20 17:16:38,770 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 17:16:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-20 17:16:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-20 17:16:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 17:16:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-20 17:16:38,777 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 24 [2020-07-20 17:16:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:38,777 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-20 17:16:38,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:16:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-20 17:16:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 17:16:38,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:38,779 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 17:16:38,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:38,992 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 17:16:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-07-20 17:16:38,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:38,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348325629] [2020-07-20 17:16:38,994 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 17:16:39,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:39,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:16:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:39,096 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 17:16:39,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:39,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348325629] [2020-07-20 17:16:39,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:39,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:16:39,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432395859] [2020-07-20 17:16:39,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:16:39,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:39,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:16:39,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:16:39,103 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 3 states. [2020-07-20 17:16:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:39,115 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-07-20 17:16:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:16:39,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 17:16:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:39,117 INFO L225 Difference]: With dead ends: 78 [2020-07-20 17:16:39,117 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 17:16:39,118 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 17:16:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 17:16:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-20 17:16:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 17:16:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-20 17:16:39,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 25 [2020-07-20 17:16:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:39,123 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-20 17:16:39,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:16:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-20 17:16:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:16:39,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:39,124 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 17:16:39,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:39,337 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 17:16:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-07-20 17:16:39,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:39,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662964194] [2020-07-20 17:16:39,338 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 17:16:39,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:16:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:39,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:16:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:39,539 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 17:16:39,540 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:39,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:39,549 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 17:16:39,550 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:39,555 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:39,556 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:39,556 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:16:39,566 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:39,567 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:16:39,576 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 17:16:39,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:39,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662964194] [2020-07-20 17:16:39,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:39,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:16:39,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577791512] [2020-07-20 17:16:39,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:16:39,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:39,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:16:39,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:16:39,578 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-07-20 17:16:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:39,690 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-07-20 17:16:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:16:39,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-20 17:16:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:39,691 INFO L225 Difference]: With dead ends: 86 [2020-07-20 17:16:39,692 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 17:16:39,692 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 17:16:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 17:16:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-20 17:16:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 17:16:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-07-20 17:16:39,697 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 27 [2020-07-20 17:16:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:39,697 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-07-20 17:16:39,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:16:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-07-20 17:16:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:16:39,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:39,699 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 17:16:39,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:39,912 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 17:16:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1630846939, now seen corresponding path program 1 times [2020-07-20 17:16:39,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:39,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814052568] [2020-07-20 17:16:39,913 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 17:16:40,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 17:16:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:40,097 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 17:16:40,098 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,103 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,106 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-20 17:16:40,122 INFO L624 ElimStorePlain]: treesize reduction 21, result has 30.0 percent of original size [2020-07-20 17:16:40,123 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,124 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:38, output treesize:5 [2020-07-20 17:16:40,154 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,155 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 17:16:40,155 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,169 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,170 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_39|], 8=[|v_#memory_$Pointer$.base_41|]} [2020-07-20 17:16:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:40,178 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,190 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:40,207 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 17:16:40,208 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 17:16:40,209 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,227 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,228 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 17:16:40,229 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-20 17:16:40,262 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 17:16:40,273 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 17:16:40,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:40,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814052568] [2020-07-20 17:16:40,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:40,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:16:40,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079635710] [2020-07-20 17:16:40,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:16:40,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:16:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:16:40,276 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 5 states. [2020-07-20 17:16:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:40,468 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2020-07-20 17:16:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:16:40,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 17:16:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:40,470 INFO L225 Difference]: With dead ends: 147 [2020-07-20 17:16:40,470 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 17:16:40,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:16:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 17:16:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-07-20 17:16:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 17:16:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-20 17:16:40,476 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 27 [2020-07-20 17:16:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:40,476 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-20 17:16:40,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:16:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-20 17:16:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:16:40,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:40,478 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 17:16:40,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:40,679 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 17:16:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-07-20 17:16:40,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:40,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970740880] [2020-07-20 17:16:40,681 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 17:16:40,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:40,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:16:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:40,784 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 17:16:40,785 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,790 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,794 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 17:16:40,796 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,801 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,801 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,802 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-20 17:16:40,834 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 17:16:40,835 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,843 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,847 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 17:16:40,847 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:40,852 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:40,852 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 17:16:40,853 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-07-20 17:16:40,866 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 17:16:40,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970740880] [2020-07-20 17:16:40,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:40,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:16:40,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483280947] [2020-07-20 17:16:40,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:16:40,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:16:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:16:40,868 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 5 states. [2020-07-20 17:16:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:41,083 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-07-20 17:16:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:16:41,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-20 17:16:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:41,085 INFO L225 Difference]: With dead ends: 176 [2020-07-20 17:16:41,085 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 17:16:41,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:16:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 17:16:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 86. [2020-07-20 17:16:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 17:16:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-07-20 17:16:41,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 28 [2020-07-20 17:16:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:41,095 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-07-20 17:16:41,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:16:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-07-20 17:16:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:16:41,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:41,102 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 17:16:41,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:41,303 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 17:16:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-20 17:16:41,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:41,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314663909] [2020-07-20 17:16:41,306 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 17:16:41,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 17:16:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:41,437 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 17:16:41,437 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,441 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,441 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-20 17:16:41,468 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,468 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 17:16:41,469 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,489 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:41,519 INFO L350 Elim1Store]: treesize reduction 99, result has 8.3 percent of original size [2020-07-20 17:16:41,520 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 17:16:41,520 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,538 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:41,547 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 17:16:41,548 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,566 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,567 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 17:16:41,568 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:353, output treesize:72 [2020-07-20 17:16:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:16:41,671 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:16:41,692 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,692 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 105 treesize of output 99 [2020-07-20 17:16:41,694 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 17:16:41,695 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 17:16:41,696 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:16:41,699 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-07-20 17:16:41,700 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-07-20 17:16:41,701 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-07-20 17:16:41,703 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 17:16:41,741 INFO L624 ElimStorePlain]: treesize reduction 50, result has 47.9 percent of original size [2020-07-20 17:16:41,754 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,755 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 39 treesize of output 34 [2020-07-20 17:16:41,756 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:16:41,760 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:16:41,761 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 17:16:41,761 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:114, output treesize:7 [2020-07-20 17:16:41,779 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 17:16:41,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:41,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314663909] [2020-07-20 17:16:41,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:41,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:16:41,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773628290] [2020-07-20 17:16:41,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:16:41,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:41,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:16:41,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:16:41,781 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 7 states. [2020-07-20 17:16:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:42,507 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2020-07-20 17:16:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 17:16:42,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 17:16:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:42,510 INFO L225 Difference]: With dead ends: 228 [2020-07-20 17:16:42,510 INFO L226 Difference]: Without dead ends: 226 [2020-07-20 17:16:42,510 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 17:16:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-20 17:16:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 98. [2020-07-20 17:16:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 17:16:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2020-07-20 17:16:42,518 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 28 [2020-07-20 17:16:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:42,519 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2020-07-20 17:16:42,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:16:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2020-07-20 17:16:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 17:16:42,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:42,520 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 17:16:42,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:42,724 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 17:16:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:42,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-07-20 17:16:42,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:42,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573430272] [2020-07-20 17:16:42,726 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 17:16:42,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:16:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:16:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:16:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:16:42,852 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 17:16:42,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:16:42,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573430272] [2020-07-20 17:16:42,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:16:42,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:16:42,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543423849] [2020-07-20 17:16:42,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:16:42,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:16:42,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:16:42,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:16:42,854 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 3 states. [2020-07-20 17:16:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:16:42,907 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-07-20 17:16:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:16:42,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 17:16:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:16:42,908 INFO L225 Difference]: With dead ends: 98 [2020-07-20 17:16:42,908 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 17:16:42,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 17:16:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 17:16:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-20 17:16:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 17:16:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-07-20 17:16:42,916 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 30 [2020-07-20 17:16:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:16:42,916 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-07-20 17:16:42,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:16:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-07-20 17:16:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:16:42,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:16:42,917 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 17:16:43,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:43,119 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 17:16:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:16:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-20 17:16:43,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:16:43,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295133368] [2020-07-20 17:16:43,120 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 17:16:43,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:16:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:16:43,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:16:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:16:43,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:16:43,284 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:16:43,284 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:16:43,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:16:43,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:16:43 BoogieIcfgContainer [2020-07-20 17:16:43,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:16:43,525 INFO L168 Benchmark]: Toolchain (without parser) took 9907.20 ms. Allocated memory was 137.9 MB in the beginning and 306.2 MB in the end (delta: 168.3 MB). Free memory was 101.9 MB in the beginning and 229.6 MB in the end (delta: -127.7 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:43,525 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:16:43,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.25 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.5 MB in the beginning and 171.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:43,526 INFO L168 Benchmark]: Boogie Preprocessor took 77.04 ms. Allocated memory is still 203.4 MB. Free memory was 171.0 MB in the beginning and 167.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:43,527 INFO L168 Benchmark]: RCFGBuilder took 771.09 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 111.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:16:43,527 INFO L168 Benchmark]: TraceAbstraction took 8402.09 ms. Allocated memory was 203.4 MB in the beginning and 306.2 MB in the end (delta: 102.8 MB). Free memory was 111.5 MB in the beginning and 229.6 MB in the end (delta: -118.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:16:43,529 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.25 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.5 MB in the beginning and 171.0 MB in the end (delta: -69.5 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.04 ms. Allocated memory is still 203.4 MB. Free memory was 171.0 MB in the beginning and 167.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 771.09 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 111.5 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8402.09 ms. Allocated memory was 203.4 MB in the beginning and 306.2 MB in the end (delta: 102.8 MB). Free memory was 111.5 MB in the beginning and 229.6 MB in the end (delta: -118.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) VAL [list={8857:0}, malloc(sizeof(SLL))={8857:0}] [L995] COND FALSE !(!(list != ((void*)0))) VAL [list={8857:0}, malloc(sizeof(SLL))={8857:0}] [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={8857:0}, list->inner={8856:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; VAL [end={8857:0}, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={8857:0}, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={8857:0}, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner VAL [end={8857:0}, inner={8856:0}, len=0, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={8857:0}, inner={8856:0}, len=1, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={8857:0}, inner={8856:0}, len=1, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1028] EXPR inner->inner VAL [end={8857:0}, inner={8856:0}, inner->inner={0:0}, len=1, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next VAL [end={8857:0}, inner={8856:0}, inner->next={0:0}, len=1, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() VAL [end={8857:0}, inner={8856:0}, len=1, list={8857:0}, malloc(sizeof(SLL))={8856:0}, malloc(sizeof(SLL))={8857:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1027 SDtfs, 1053 SDslu, 1676 SDs, 0 SdLazy, 759 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 286 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 490 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 309 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 265 ConstructedInterpolants, 6 QuantifiedInterpolants, 52033 SizeOfPredicates, 71 NumberOfNonLiveVariables, 896 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...