/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -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-eb0fd7c [2020-09-21 10:28:25,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:25,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:25,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:25,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:25,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:25,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:25,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:25,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:25,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:25,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:25,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:25,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:25,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:25,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:25,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:25,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:25,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:25,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:25,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:25,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:25,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:25,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:25,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:25,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:25,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:28:25,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:28:25,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:28:25,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:28:25,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:28:25,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:28:25,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:28:25,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:28:25,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:25,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:25,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:25,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:28:25,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:25,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:25,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:25,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:25,145 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:25,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:25,145 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:25,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:25,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:25,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:25,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:25,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:25,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:25,147 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:25,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:25,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:25,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:25,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:25,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:25,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:25,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:25,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:25,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:25,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:25,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:25,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:25,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:25,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:25,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:25,150 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:28:25,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:25,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:25,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:25,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:25,661 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:25,662 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-09-21 10:28:25,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928f4cab5/8c8aceb7a7d44e8b851124fcede02ccc/FLAG3aeaa6dc3 [2020-09-21 10:28:26,315 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:26,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2of.c [2020-09-21 10:28:26,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928f4cab5/8c8aceb7a7d44e8b851124fcede02ccc/FLAG3aeaa6dc3 [2020-09-21 10:28:26,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/928f4cab5/8c8aceb7a7d44e8b851124fcede02ccc [2020-09-21 10:28:26,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:26,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:26,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:26,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:26,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:26,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:26" (1/1) ... [2020-09-21 10:28:26,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d064956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:26, skipping insertion in model container [2020-09-21 10:28:26,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:26" (1/1) ... [2020-09-21 10:28:26,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:26,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:26,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:26,973 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:26,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:27,111 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:27,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27 WrapperNode [2020-09-21 10:28:27,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:27,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:27,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:27,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:27,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... [2020-09-21 10:28:27,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:27,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:27,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:27,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:27,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:28:27,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:27,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:27,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:28:27,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:27,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:27,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:27,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:28:27,263 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:28:27,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:27,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:28:27,263 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:28:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:28:27,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:28:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:28:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:27,593 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:27,594 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-21 10:28:27,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:27 BoogieIcfgContainer [2020-09-21 10:28:27,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:27,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:27,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:27,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:26" (1/3) ... [2020-09-21 10:28:27,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3300d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:27, skipping insertion in model container [2020-09-21 10:28:27,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:27" (2/3) ... [2020-09-21 10:28:27,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3300d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:27, skipping insertion in model container [2020-09-21 10:28:27,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:27" (3/3) ... [2020-09-21 10:28:27,610 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-09-21 10:28:27,623 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:27,633 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:27,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:27,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:27,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:27,690 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:27,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:27,690 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:27,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:27,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:27,691 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-09-21 10:28:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:28:27,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:27,729 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] [2020-09-21 10:28:27,730 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-09-21 10:28:27,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:27,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625230647] [2020-09-21 10:28:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:27,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625230647] [2020-09-21 10:28:27,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:27,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:27,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589736922] [2020-09-21 10:28:28,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:28,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:28,022 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-09-21 10:28:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:28,176 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-09-21 10:28:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:28,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 10:28:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:28,190 INFO L225 Difference]: With dead ends: 76 [2020-09-21 10:28:28,190 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:28:28,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:28:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 10:28:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:28:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-09-21 10:28:28,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-09-21 10:28:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:28,249 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-09-21 10:28:28,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-09-21 10:28:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:28:28,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:28,251 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] [2020-09-21 10:28:28,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:28,251 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-09-21 10:28:28,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:28,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402934743] [2020-09-21 10:28:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:28,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:28,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:28,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402934743] [2020-09-21 10:28:28,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:28,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925752071] [2020-09-21 10:28:28,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:28,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:28,403 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-09-21 10:28:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:28,567 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-09-21 10:28:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:28,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-21 10:28:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:28,570 INFO L225 Difference]: With dead ends: 69 [2020-09-21 10:28:28,570 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:28:28,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:28:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-21 10:28:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:28:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-09-21 10:28:28,583 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-09-21 10:28:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:28,584 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-09-21 10:28:28,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-09-21 10:28:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:28:28,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:28,586 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] [2020-09-21 10:28:28,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:28,586 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-09-21 10:28:28,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:28,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078492352] [2020-09-21 10:28:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:28:28,738 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:28:28,738 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:28,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:28,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:28 BoogieIcfgContainer [2020-09-21 10:28:28,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:28,769 INFO L168 Benchmark]: Toolchain (without parser) took 2091.94 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 102.1 MB in the beginning and 91.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 65.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:28,770 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:28:28,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.76 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 101.4 MB in the beginning and 180.6 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:28,772 INFO L168 Benchmark]: Boogie Preprocessor took 73.52 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:28,773 INFO L168 Benchmark]: RCFGBuilder took 411.96 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 157.3 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:28,774 INFO L168 Benchmark]: TraceAbstraction took 1165.00 ms. Allocated memory is still 201.9 MB. Free memory was 156.6 MB in the beginning and 91.8 MB in the end (delta: 64.8 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:28,779 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 428.76 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 101.4 MB in the beginning and 180.6 MB in the end (delta: -79.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.52 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.96 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 157.3 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1165.00 ms. Allocated memory is still 201.9 MB. Free memory was 156.6 MB in the beginning and 91.8 MB in the end (delta: 64.8 MB). Peak memory consumption was 64.8 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; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [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 [L32] COND TRUE i