/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/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:19:07,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:19:07,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:19:07,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:19:07,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:19:07,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:19:07,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:19:07,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:19:07,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:19:07,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:19:07,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:19:07,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:19:07,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:19:07,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:19:07,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:19:07,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:19:07,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:19:07,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:19:07,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:19:07,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:19:07,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:19:07,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:19:07,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:19:07,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:19:07,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 17:19:07,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 17:19:07,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 17:19:07,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 17:19:07,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 17:19:07,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 17:19:07,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 17:19:07,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 17:19:07,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 17:19:07,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 17:19:07,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 17:19:07,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 17:19:07,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 17:19:07,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 17:19:07,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:19:07,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:19:07,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:19:07,494 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 17:19:07,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:19:07,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:19:07,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:19:07,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:19:07,510 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:19:07,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:19:07,511 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:19:07,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:19:07,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:19:07,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:19:07,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:19:07,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:19:07,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:19:07,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:19:07,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:19:07,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:19:07,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:19:07,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:19:07,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:19:07,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:19:07,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:19:07,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:19:07,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:19:07,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:19:07,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:19:07,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:19:07,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:07,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:19:07,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:19:07,515 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 17:19:07,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:19:07,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:19:07,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:19:07,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:19:07,838 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:19:07,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 17:19:07,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ccd391f/f31fac6624a142298c69c92c85dccea6/FLAG105578964 [2020-07-20 17:19:08,480 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:19:08,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 17:19:08,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ccd391f/f31fac6624a142298c69c92c85dccea6/FLAG105578964 [2020-07-20 17:19:08,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ccd391f/f31fac6624a142298c69c92c85dccea6 [2020-07-20 17:19:08,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:19:08,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:19:08,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:19:08,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:19:08,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:19:08,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:08" (1/1) ... [2020-07-20 17:19:08,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f03423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:08, skipping insertion in model container [2020-07-20 17:19:08,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:19:08" (1/1) ... [2020-07-20 17:19:08,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:19:08,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:19:09,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:19:09,289 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:19:09,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:19:09,451 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:19:09,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09 WrapperNode [2020-07-20 17:19:09,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:19:09,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:19:09,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:19:09,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:19:09,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (1/1) ... [2020-07-20 17:19:09,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:19:09,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:19:09,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:19:09,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:19:09,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (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 17:19:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:19:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:19:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 17:19:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 17:19:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 17:19:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-20 17:19:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 17:19:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 17:19:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 17:19:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 17:19:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 17:19:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 17:19:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 17:19:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 17:19:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 17:19:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 17:19:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 17:19:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 17:19:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 17:19:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 17:19:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 17:19:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 17:19:09,615 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 17:19:09,616 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 17:19:09,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:19:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:19:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:19:09,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:19:10,008 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 17:19:10,216 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:19:10,216 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:19:10,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:10 BoogieIcfgContainer [2020-07-20 17:19:10,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:19:10,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:19:10,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:19:10,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:19:10,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:19:08" (1/3) ... [2020-07-20 17:19:10,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61430dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:10, skipping insertion in model container [2020-07-20 17:19:10,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:19:09" (2/3) ... [2020-07-20 17:19:10,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61430dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:19:10, skipping insertion in model container [2020-07-20 17:19:10,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:19:10" (3/3) ... [2020-07-20 17:19:10,229 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-20 17:19:10,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:19:10,244 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:19:10,257 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:19:10,277 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:19:10,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:19:10,278 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:19:10,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:19:10,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:19:10,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:19:10,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:19:10,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:19:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 17:19:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:19:10,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:10,302 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 17:19:10,303 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-20 17:19:10,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:10,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35414390] [2020-07-20 17:19:10,315 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 17:19:10,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:10,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:19:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:10,577 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:19:10,599 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 17:19:10,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:10,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35414390] [2020-07-20 17:19:10,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:10,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:19:10,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865037621] [2020-07-20 17:19:10,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:19:10,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:19:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:19:10,629 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-20 17:19:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:10,722 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-07-20 17:19:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:19:10,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-20 17:19:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:10,736 INFO L225 Difference]: With dead ends: 66 [2020-07-20 17:19:10,736 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 17:19:10,740 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 17:19:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 17:19:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 17:19:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 17:19:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-20 17:19:10,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 20 [2020-07-20 17:19:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:10,781 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-20 17:19:10,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:19:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-20 17:19:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:19:10,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:10,783 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 17:19:10,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:10,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash 248265910, now seen corresponding path program 1 times [2020-07-20 17:19:10,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:11,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034199363] [2020-07-20 17:19:11,000 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 17:19:11,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:19:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:19:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:11,145 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 17:19:11,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:11,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034199363] [2020-07-20 17:19:11,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:11,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:19:11,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663799343] [2020-07-20 17:19:11,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:19:11,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:19:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:19:11,149 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 5 states. [2020-07-20 17:19:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:11,196 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-07-20 17:19:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:19:11,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 17:19:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:11,198 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:19:11,198 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:19:11,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:19:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:19:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-07-20 17:19:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:19:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-07-20 17:19:11,207 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2020-07-20 17:19:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:11,208 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-07-20 17:19:11,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:19:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-07-20 17:19:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:19:11,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:11,209 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 17:19:11,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:11,425 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash 215855051, now seen corresponding path program 1 times [2020-07-20 17:19:11,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:11,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946136379] [2020-07-20 17:19:11,426 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 17:19:11,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:19:11,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:19:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:11,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:19:11,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946136379] [2020-07-20 17:19:11,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:19:11,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:19:11,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078120630] [2020-07-20 17:19:11,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:19:11,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:11,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:19:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:19:11,635 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-07-20 17:19:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:11,672 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-07-20 17:19:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:19:11,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 17:19:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:11,674 INFO L225 Difference]: With dead ends: 69 [2020-07-20 17:19:11,674 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 17:19:11,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 17:19:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 17:19:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 17:19:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 17:19:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-20 17:19:11,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-20 17:19:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:11,696 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-20 17:19:11,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:19:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-20 17:19:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:19:11,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:11,698 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 17:19:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:11,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:11,912 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-20 17:19:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:11,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630748944] [2020-07-20 17:19:11,913 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 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 17:19:12,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:19:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 17:19:12,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:19:12,115 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 17:19:12,116 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,126 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:19:12,134 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 17:19:12,134 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,146 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,147 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,147 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2020-07-20 17:19:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:19:12,294 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 17:19:12,295 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,305 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,312 INFO L350 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2020-07-20 17:19:12,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 17:19:12,313 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,318 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,318 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 17:19:12,319 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:7 [2020-07-20 17:19:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:12,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:12,600 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 17 [2020-07-20 17:19:12,606 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,616 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-20 17:19:12,617 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,622 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,625 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 17 [2020-07-20 17:19:12,629 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,638 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size [2020-07-20 17:19:12,639 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:19:12,642 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:19:12,642 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-20 17:19:12,643 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:39, output treesize:7 [2020-07-20 17:19:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:12,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630748944] [2020-07-20 17:19:12,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:12,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 17:19:12,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123866094] [2020-07-20 17:19:12,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 17:19:12,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 17:19:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:19:12,654 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 14 states. [2020-07-20 17:19:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:12,976 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-07-20 17:19:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:19:12,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-07-20 17:19:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:12,978 INFO L225 Difference]: With dead ends: 75 [2020-07-20 17:19:12,978 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 17:19:12,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-07-20 17:19:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 17:19:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-07-20 17:19:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 17:19:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-07-20 17:19:12,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 27 [2020-07-20 17:19:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:12,988 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-07-20 17:19:12,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 17:19:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-07-20 17:19:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:19:12,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:12,989 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 17:19:13,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:13,203 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 109910721, now seen corresponding path program 1 times [2020-07-20 17:19:13,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:13,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566865859] [2020-07-20 17:19:13,205 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 17:19:13,341 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:19:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:13,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:13,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566865859] [2020-07-20 17:19:13,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:13,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 17:19:13,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000910332] [2020-07-20 17:19:13,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:19:13,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:19:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:19:13,481 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 9 states. [2020-07-20 17:19:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:13,531 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-07-20 17:19:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:19:13,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 17:19:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:13,532 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:19:13,533 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 17:19:13,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 17:19:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 17:19:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-20 17:19:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:19:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-20 17:19:13,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 28 [2020-07-20 17:19:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:13,539 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-20 17:19:13,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:19:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-20 17:19:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 17:19:13,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:13,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:13,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:13,742 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-20 17:19:13,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:13,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742844176] [2020-07-20 17:19:13,745 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 17:19:14,489 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:14,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:19:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:14,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:14,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742844176] [2020-07-20 17:19:14,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:14,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 17:19:14,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570599368] [2020-07-20 17:19:14,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 17:19:14,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 17:19:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 17:19:14,659 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 11 states. [2020-07-20 17:19:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:14,730 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-20 17:19:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:19:14,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-07-20 17:19:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:14,734 INFO L225 Difference]: With dead ends: 76 [2020-07-20 17:19:14,734 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 17:19:14,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:19:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 17:19:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 17:19:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 17:19:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 17:19:14,746 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-20 17:19:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:14,749 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 17:19:14,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 17:19:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 17:19:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 17:19:14,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:14,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:14,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:14,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-20 17:19:14,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:14,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957692985] [2020-07-20 17:19:14,968 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 17:19:20,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:19:20,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:19:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 17:19:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:19:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:20,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:19:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:19:20,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957692985] [2020-07-20 17:19:20,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:19:20,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 17:19:20,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837446667] [2020-07-20 17:19:20,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:19:20,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:19:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:19:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:19:20,550 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-20 17:19:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:19:20,629 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-20 17:19:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:19:20,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-07-20 17:19:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:19:20,631 INFO L225 Difference]: With dead ends: 83 [2020-07-20 17:19:20,631 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 17:19:20,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:19:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 17:19:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 17:19:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 17:19:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-20 17:19:20,638 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-20 17:19:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:19:20,639 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-20 17:19:20,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:19:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-20 17:19:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 17:19:20,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:19:20,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:19:20,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:19:20,842 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:19:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:19:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-20 17:19:20,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:19:20,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502493012] [2020-07-20 17:19:20,843 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 17:21:51,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:21:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:21:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 17:21:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:21:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:21:53,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:21:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:21:53,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502493012] [2020-07-20 17:21:53,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:21:53,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 17:21:53,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736046534] [2020-07-20 17:21:53,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 17:21:53,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:21:53,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 17:21:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:21:53,800 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 14 states. [2020-07-20 17:21:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:21:53,888 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-07-20 17:21:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:21:53,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-20 17:21:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:21:53,889 INFO L225 Difference]: With dead ends: 90 [2020-07-20 17:21:53,890 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 17:21:53,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-07-20 17:21:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 17:21:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 17:21:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 17:21:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-20 17:21:53,897 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-07-20 17:21:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:21:53,897 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-20 17:21:53,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 17:21:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-20 17:21:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 17:21:53,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:21:53,899 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:21:54,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:21:54,114 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:21:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:21:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 4 times [2020-07-20 17:21:54,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:21:54,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706019497] [2020-07-20 17:21:54,117 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