/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:41:17,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:41:17,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:41:17,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:41:17,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:41:17,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:41:17,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:41:17,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:41:17,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:41:17,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:41:17,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:41:17,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:41:17,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:41:17,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:41:17,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:41:17,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:41:17,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:41:17,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:41:17,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:41:17,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:41:17,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:41:17,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:41:17,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:41:17,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:41:17,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:41:17,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:41:17,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:41:17,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:41:17,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:41:17,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:41:17,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:41:17,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:41:17,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:41:17,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:41:17,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:41:17,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:41:17,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:41:17,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:41:17,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:41:17,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:41:17,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:41:17,242 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 16:41:17,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:41:17,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:41:17,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:41:17,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:41:17,259 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:41:17,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:41:17,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:41:17,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:41:17,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:41:17,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:41:17,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:41:17,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:41:17,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:41:17,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:41:17,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:41:17,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:41:17,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:41:17,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:41:17,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:41:17,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:41:17,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:41:17,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:17,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:41:17,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:41:17,263 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 -> 2 [2020-07-21 16:41:17,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:41:17,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:41:17,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:41:17,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:41:17,551 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:41:17,552 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-21 16:41:17,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/494f434c8/239642c459504ca5b63a81050fce2acb/FLAG50ace91dd [2020-07-21 16:41:18,053 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:41:18,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-21 16:41:18,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/494f434c8/239642c459504ca5b63a81050fce2acb/FLAG50ace91dd [2020-07-21 16:41:18,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/494f434c8/239642c459504ca5b63a81050fce2acb [2020-07-21 16:41:18,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:41:18,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:41:18,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:41:18,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:41:18,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:41:18,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683036d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18, skipping insertion in model container [2020-07-21 16:41:18,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:41:18,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:41:18,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:41:18,669 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:41:18,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:41:18,711 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:41:18,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18 WrapperNode [2020-07-21 16:41:18,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:41:18,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:41:18,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:41:18,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:41:18,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (1/1) ... [2020-07-21 16:41:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:41:18,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:41:18,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:41:18,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:41:18,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (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 16:41:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:41:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:41:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:41:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:41:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:41:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:41:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:41:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:41:19,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:41:19,228 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:41:19,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:41:19 BoogieIcfgContainer [2020-07-21 16:41:19,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:41:19,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:41:19,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:41:19,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:41:19,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:41:18" (1/3) ... [2020-07-21 16:41:19,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da82ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:41:19, skipping insertion in model container [2020-07-21 16:41:19,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:41:18" (2/3) ... [2020-07-21 16:41:19,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da82ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:41:19, skipping insertion in model container [2020-07-21 16:41:19,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:41:19" (3/3) ... [2020-07-21 16:41:19,240 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn1f.c [2020-07-21 16:41:19,249 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:41:19,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:41:19,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:41:19,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:41:19,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:41:19,294 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:41:19,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:41:19,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:41:19,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:41:19,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:41:19,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:41:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 16:41:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:41:19,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:19,316 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 16:41:19,316 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 16:41:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:19,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293727278] [2020-07-21 16:41:19,329 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 16:41:19,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:41:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:19,458 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 16:41:19,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:19,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293727278] [2020-07-21 16:41:19,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:19,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:41:19,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733390705] [2020-07-21 16:41:19,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:41:19,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:41:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:41:19,480 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 16:41:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:19,504 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 16:41:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:41:19,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 16:41:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:19,515 INFO L225 Difference]: With dead ends: 62 [2020-07-21 16:41:19,515 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 16:41:19,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:41:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 16:41:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 16:41:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 16:41:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-21 16:41:19,559 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-21 16:41:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:19,560 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-21 16:41:19,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:41:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-21 16:41:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:41:19,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:19,562 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 16:41:19,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:19,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-21 16:41:19,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:19,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121582519] [2020-07-21 16:41:19,779 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 16:41:19,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:19,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:41:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:41:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:41:19,891 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 16:41:19,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:41:19,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121582519] [2020-07-21 16:41:19,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:41:19,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:41:19,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87046442] [2020-07-21 16:41:19,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:41:19,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:41:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:41:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:41:19,896 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-21 16:41:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:41:19,982 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-21 16:41:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:41:19,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 16:41:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:41:19,986 INFO L225 Difference]: With dead ends: 56 [2020-07-21 16:41:19,986 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 16:41:19,988 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 16:41:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 16:41:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 16:41:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:41:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 16:41:20,000 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 16:41:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:41:20,001 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 16:41:20,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:41:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 16:41:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:41:20,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:41:20,003 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 16:41:20,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:20,217 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:41:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:41:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 16:41:20,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:41:20,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020989440] [2020-07-21 16:41:20,220 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:20,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:41:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:41:20,279 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:41:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:41:20,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:41:20,319 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:41:20,319 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:41:20,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:41:20,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:41:20 BoogieIcfgContainer [2020-07-21 16:41:20,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:41:20,577 INFO L168 Benchmark]: Toolchain (without parser) took 2121.54 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.4 MB in the beginning and 100.8 MB in the end (delta: 590.6 kB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,577 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.90 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,580 INFO L168 Benchmark]: Boogie Preprocessor took 131.43 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,582 INFO L168 Benchmark]: RCFGBuilder took 387.55 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,583 INFO L168 Benchmark]: TraceAbstraction took 1341.13 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 100.8 MB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:41:20,588 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.90 ms. Allocated memory is still 145.2 MB. Free memory was 101.0 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.43 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.6 MB in the beginning and 179.8 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.55 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1341.13 ms. Allocated memory is still 202.4 MB. Free memory was 161.7 MB in the beginning and 100.8 MB in the end (delta: 60.9 MB). Peak memory consumption was 60.9 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={1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=1] [L29] COND TRUE i