/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:40:27,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:40:27,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:40:27,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:40:27,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:40:27,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:40:27,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:40:27,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:40:27,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:40:27,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:40:27,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:40:27,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:40:27,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:40:27,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:40:27,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:40:27,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:40:27,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:40:27,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:40:27,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:40:27,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:40:27,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:40:27,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:40:27,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:40:27,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:40:27,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:40:27,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:40:27,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:40:27,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:40:27,708 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 01:40:27,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:40:27,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:40:27,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:40:27,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:40:27,756 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:40:27,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:40:27,756 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:40:27,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:40:27,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:40:27,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:40:27,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:40:27,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:40:27,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:40:27,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:40:27,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:40:27,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:40:27,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:40:27,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:40:27,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:40:27,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:40:27,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:40:27,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:40:27,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:40:27,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:40:27,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:40:27,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:40:27,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:27,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:40:27,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:40:27,762 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:40:28,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:40:28,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:40:28,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:40:28,120 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:40:28,121 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:40:28,122 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-07-21 01:40:28,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e52e134c/0a88a9832d934063aa62bb20aff3c811/FLAGbd73840d1 [2020-07-21 01:40:28,759 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:40:28,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2020-07-21 01:40:28,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e52e134c/0a88a9832d934063aa62bb20aff3c811/FLAGbd73840d1 [2020-07-21 01:40:29,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e52e134c/0a88a9832d934063aa62bb20aff3c811 [2020-07-21 01:40:29,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:40:29,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:40:29,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:40:29,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:40:29,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:40:29,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778246e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29, skipping insertion in model container [2020-07-21 01:40:29,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:40:29,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:40:29,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:40:29,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:40:29,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:40:29,570 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:40:29,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29 WrapperNode [2020-07-21 01:40:29,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:40:29,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:40:29,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:40:29,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:40:29,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (1/1) ... [2020-07-21 01:40:29,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:40:29,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:40:29,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:40:29,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:40:29,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (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 01:40:29,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:40:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:40:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:40:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:40:29,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:40:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:40:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:40:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:40:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:40:30,055 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:40:30,055 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 01:40:30,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:30 BoogieIcfgContainer [2020-07-21 01:40:30,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:40:30,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:40:30,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:40:30,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:40:30,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:40:29" (1/3) ... [2020-07-21 01:40:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12544f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:30, skipping insertion in model container [2020-07-21 01:40:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:29" (2/3) ... [2020-07-21 01:40:30,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12544f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:30, skipping insertion in model container [2020-07-21 01:40:30,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:30" (3/3) ... [2020-07-21 01:40:30,069 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-07-21 01:40:30,083 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:40:30,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:40:30,108 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:40:30,149 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:40:30,149 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:40:30,150 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:40:30,150 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:40:30,150 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:40:30,150 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:40:30,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:40:30,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:40:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-21 01:40:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:40:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:40:30,176 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] [2020-07-21 01:40:30,177 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:40:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:40:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-07-21 01:40:30,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:40:30,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708491276] [2020-07-21 01:40:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:30,309 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:40:30,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:40:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:40:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:40:30,349 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 01:40:30,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:40:30,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708491276] [2020-07-21 01:40:30,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:40:30,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:40:30,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558247617] [2020-07-21 01:40:30,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:40:30,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:40:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:40:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:40:30,376 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-21 01:40:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:40:30,404 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-07-21 01:40:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:40:30,406 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-07-21 01:40:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:40:30,414 INFO L225 Difference]: With dead ends: 76 [2020-07-21 01:40:30,415 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 01:40:30,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 01:40:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 01:40:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-21 01:40:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:40:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 01:40:30,460 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-07-21 01:40:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:40:30,460 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 01:40:30,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:40:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 01:40:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 01:40:30,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:40:30,462 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] [2020-07-21 01:40:30,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:30,664 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:40:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:40:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-07-21 01:40:30,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:40:30,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69055865] [2020-07-21 01:40:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:30,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:40:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:40:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:40:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:40:30,824 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 01:40:30,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:40:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69055865] [2020-07-21 01:40:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:40:30,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:40:30,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711560554] [2020-07-21 01:40:30,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:40:30,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:40:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:40:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:40:30,830 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-07-21 01:40:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:40:30,970 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-07-21 01:40:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:40:30,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-21 01:40:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:40:30,973 INFO L225 Difference]: With dead ends: 69 [2020-07-21 01:40:30,973 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 01:40:30,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 01:40:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 01:40:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-07-21 01:40:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:40:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-21 01:40:30,986 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-07-21 01:40:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:40:30,986 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-21 01:40:30,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:40:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-21 01:40:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 01:40:30,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:40:30,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:40:31,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:31,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:40:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:40:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-07-21 01:40:31,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:40:31,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917037205] [2020-07-21 01:40:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:31,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:40:31,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:40:31,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:40:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:40:31,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:40:31,388 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:40:31,389 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:40:31,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:40:31,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:40:31 BoogieIcfgContainer [2020-07-21 01:40:31,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:40:31,681 INFO L168 Benchmark]: Toolchain (without parser) took 2582.01 ms. Allocated memory was 143.7 MB in the beginning and 230.2 MB in the end (delta: 86.5 MB). Free memory was 101.4 MB in the beginning and 197.1 MB in the end (delta: -95.7 MB). Peak memory consumption was 82.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,682 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.83 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 179.7 MB in the end (delta: -78.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,684 INFO L168 Benchmark]: Boogie Preprocessor took 85.40 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,685 INFO L168 Benchmark]: RCFGBuilder took 402.72 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 156.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,686 INFO L168 Benchmark]: TraceAbstraction took 1616.82 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 156.3 MB in the beginning and 197.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 79.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:40:31,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 469.83 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 179.7 MB in the end (delta: -78.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.40 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.72 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 156.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1616.82 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 156.3 MB in the beginning and 197.1 MB in the end (delta: -40.8 MB). Peak memory consumption was 79.8 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); [L29] int *c = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={32280:0}, b={32279:0}, c={-1:0}, i=0, malloc(sizeof(int)*N)={32279:0}, malloc(sizeof(int)*N)={-1:0}, malloc(sizeof(int)*N)={32280:0}, N=1, sum={32282:0}] [L32] COND TRUE i