/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res1of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:06,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:06,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:06,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:06,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:06,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:06,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:06,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:06,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:06,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:06,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:06,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:06,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:06,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:06,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:06,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:06,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:06,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:06,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:06,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:06,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:06,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:06,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:06,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:06,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:47:06,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:47:06,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:47:06,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:47:06,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:47:06,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 11:47:06,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:06,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:06,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:06,574 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 11:47:06,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:06,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:06,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:06,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:06,590 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:06,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:06,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:06,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:06,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:06,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:06,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:06,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:06,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:06,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:06,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:06,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:06,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:06,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:06,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:06,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:06,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:06,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:06,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:06,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:06,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:06,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:06,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:06,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:06,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:06,595 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 -> NOT_INCREMENTALLY [2020-07-20 11:47:06,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:06,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:06,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:06,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:06,885 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:06,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1of.c [2020-07-20 11:47:06,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57acd3b5d/20d9247bffa24c04a78d854597cb1a35/FLAGe8fcbb06b [2020-07-20 11:47:07,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:07,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1of.c [2020-07-20 11:47:07,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57acd3b5d/20d9247bffa24c04a78d854597cb1a35/FLAGe8fcbb06b [2020-07-20 11:47:07,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57acd3b5d/20d9247bffa24c04a78d854597cb1a35 [2020-07-20 11:47:07,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:07,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:07,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:07,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:07,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:07,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:07" (1/1) ... [2020-07-20 11:47:07,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32226f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:07, skipping insertion in model container [2020-07-20 11:47:07,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:07" (1/1) ... [2020-07-20 11:47:07,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:07,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:07,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:08,003 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:08,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:08,043 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:08,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08 WrapperNode [2020-07-20 11:47:08,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:08,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:08,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:08,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:08,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:08,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:08,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:08,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:08,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (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 11:47:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:08,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:08,225 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:08,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:08,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:08,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:08,501 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 11:47:08,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:08 BoogieIcfgContainer [2020-07-20 11:47:08,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:08,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:08,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:08,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:08,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:07" (1/3) ... [2020-07-20 11:47:08,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5182d6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:08, skipping insertion in model container [2020-07-20 11:47:08,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (2/3) ... [2020-07-20 11:47:08,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5182d6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:08, skipping insertion in model container [2020-07-20 11:47:08,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:08" (3/3) ... [2020-07-20 11:47:08,515 INFO L109 eAbstractionObserver]: Analyzing ICFG res1of.c [2020-07-20 11:47:08,530 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:08,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:08,555 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:08,582 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:08,582 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:08,582 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:08,583 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:08,583 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:08,583 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:08,583 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:08,583 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 11:47:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:47:08,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:08,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:08,611 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-07-20 11:47:08,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:08,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246026728] [2020-07-20 11:47:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:47:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:08,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:08,747 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 11:47:08,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:08,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246026728] [2020-07-20 11:47:08,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:08,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:08,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106010366] [2020-07-20 11:47:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:08,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:08,778 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-20 11:47:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:08,803 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-20 11:47:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:08,805 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-07-20 11:47:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:08,814 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:47:08,814 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:47:08,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:47:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:47:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:47:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-20 11:47:08,859 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-07-20 11:47:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:08,860 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-20 11:47:08,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-20 11:47:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:47:08,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:08,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:09,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:09,078 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-07-20 11:47:09,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:09,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127670969] [2020-07-20 11:47:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:47:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:09,229 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 11:47:09,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:09,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127670969] [2020-07-20 11:47:09,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:09,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:09,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644692885] [2020-07-20 11:47:09,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:09,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:09,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:09,236 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-07-20 11:47:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:09,352 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-07-20 11:47:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:09,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-07-20 11:47:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:09,355 INFO L225 Difference]: With dead ends: 53 [2020-07-20 11:47:09,355 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 11:47:09,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 11:47:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-20 11:47:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:47:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 11:47:09,365 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-07-20 11:47:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:09,365 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 11:47:09,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 11:47:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:47:09,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:09,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:09,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:09,582 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-07-20 11:47:09,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:09,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229173643] [2020-07-20 11:47:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:47:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:09,653 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:09,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:09,704 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:09,705 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:09,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:09,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:09 BoogieIcfgContainer [2020-07-20 11:47:09,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:09,970 INFO L168 Benchmark]: Toolchain (without parser) took 2187.53 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 101.7 MB in the beginning and 96.4 MB in the end (delta: 5.3 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:09,971 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:47:09,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.46 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:09,973 INFO L168 Benchmark]: Boogie Preprocessor took 122.55 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 177.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:09,974 INFO L168 Benchmark]: RCFGBuilder took 339.36 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 159.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:09,975 INFO L168 Benchmark]: TraceAbstraction took 1459.71 ms. Allocated memory is still 200.3 MB. Free memory was 158.6 MB in the beginning and 96.4 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:09,979 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.46 ms. Allocated memory is still 136.8 MB. Free memory was 101.3 MB in the beginning and 90.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.55 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 177.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.36 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 159.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1459.71 ms. Allocated memory is still 200.3 MB. Free memory was 158.6 MB in the beginning and 96.4 MB in the end (delta: 62.1 MB). Peak memory consumption was 62.1 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)=5, 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L28] int *b = malloc(sizeof(int)*N); [L30] sum[0] = 0 [L31] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L31] COND TRUE i