/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:41,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:41,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:41,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:41,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:41,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:41,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:41,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:41,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:41,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:41,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:41,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:41,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:41,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:41,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:41,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:41,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:41,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:41,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:41,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:41,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:41,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:41,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:41,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:41,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:18:41,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:18:41,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:18:41,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:18:41,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:18:41,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:18:41,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:18:41,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:18:41,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:18:41,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:18:41,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:18:41,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:18:41,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:18:41,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:18:41,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:41,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:41,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:41,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:18:41,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:41,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:41,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:41,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:41,507 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:41,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:41,507 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:41,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:41,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:41,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:41,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:41,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:41,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:41,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:41,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:41,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:41,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:41,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:41,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:41,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:41,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:41,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:41,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:41,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:41,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:41,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:41,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:41,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:41,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:41,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:18:41,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:41,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:41,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:41,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:41,892 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:41,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-07-21 20:18:41,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e57084a/175373bb63dd450c9a332ade473ced35/FLAG6cda2c0d3 [2020-07-21 20:18:42,497 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:42,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-07-21 20:18:42,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e57084a/175373bb63dd450c9a332ade473ced35/FLAG6cda2c0d3 [2020-07-21 20:18:42,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e57084a/175373bb63dd450c9a332ade473ced35 [2020-07-21 20:18:42,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:42,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:42,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:42,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:42,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:42,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:42" (1/1) ... [2020-07-21 20:18:42,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c5ead6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:42, skipping insertion in model container [2020-07-21 20:18:42,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:42" (1/1) ... [2020-07-21 20:18:42,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:42,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:43,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:43,117 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:43,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:43,162 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:43,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43 WrapperNode [2020-07-21 20:18:43,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:43,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:43,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:43,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:43,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... [2020-07-21 20:18:43,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:43,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:43,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:43,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:43,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:43,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:43,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:43,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:43,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:43,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:43,839 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:43,840 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:18:43,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:43 BoogieIcfgContainer [2020-07-21 20:18:43,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:43,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:43,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:43,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:43,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:42" (1/3) ... [2020-07-21 20:18:43,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6274b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:43, skipping insertion in model container [2020-07-21 20:18:43,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:43" (2/3) ... [2020-07-21 20:18:43,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6274b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:43, skipping insertion in model container [2020-07-21 20:18:43,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:43" (3/3) ... [2020-07-21 20:18:43,856 INFO L109 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2020-07-21 20:18:43,869 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:43,877 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:43,896 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:43,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:43,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:43,932 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:43,932 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:43,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:43,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:43,932 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:43,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 20:18:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:18:43,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:43,963 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] [2020-07-21 20:18:43,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 20:18:43,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:43,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231149812] [2020-07-21 20:18:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:44,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:44,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:44,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:44,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:44,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231149812] [2020-07-21 20:18:44,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:44,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:44,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488418941] [2020-07-21 20:18:44,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:44,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:44,208 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-21 20:18:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:44,408 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-07-21 20:18:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:44,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 20:18:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:44,423 INFO L225 Difference]: With dead ends: 76 [2020-07-21 20:18:44,424 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 20:18:44,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 20:18:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 20:18:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:18:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 20:18:44,489 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 20:18:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:44,490 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 20:18:44,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 20:18:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:18:44,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:44,492 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] [2020-07-21 20:18:44,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:44,707 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 20:18:44,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:44,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910748657] [2020-07-21 20:18:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:44,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:44,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:44,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:44,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:44,835 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:44,836 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:45,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:45,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:45 BoogieIcfgContainer [2020-07-21 20:18:45,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:45,096 INFO L168 Benchmark]: Toolchain (without parser) took 2252.15 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 102.4 MB in the beginning and 114.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,097 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.04 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,099 INFO L168 Benchmark]: Boogie Preprocessor took 172.39 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 91.6 MB in the beginning and 182.5 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,100 INFO L168 Benchmark]: RCFGBuilder took 508.34 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 164.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,101 INFO L168 Benchmark]: TraceAbstraction took 1246.48 ms. Allocated memory is still 204.5 MB. Free memory was 164.6 MB in the beginning and 114.5 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:45,106 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.04 ms. Allocated memory is still 145.8 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 172.39 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 91.6 MB in the beginning and 182.5 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 508.34 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 164.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1246.48 ms. Allocated memory is still 204.5 MB. Free memory was 164.6 MB in the beginning and 114.5 MB in the end (delta: 50.1 MB). Peak memory consumption was 50.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=1] [L29] COND TRUE i