/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 true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:19,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:19,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:19,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:19,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:19,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:19,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:19,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:19,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:19,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:19,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:19,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:19,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:19,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:19,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:19,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:19,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:19,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:19,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:19,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:19,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:19,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:19,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:19,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:19,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:19,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:23:19,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:23:19,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:23:19,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:23:19,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:23:19,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:23:19,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:23:19,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:23:19,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:19,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:19,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:19,841 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 [2020-08-18 16:23:19,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:19,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:19,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:19,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:19,872 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:19,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:19,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:19,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:19,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:19,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:19,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:19,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:19,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:19,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:19,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:19,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:19,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:19,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:19,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:19,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:19,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:19,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:19,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:19,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:19,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:19,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:19,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:19,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:19,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:19,879 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 -> true [2020-08-18 16:23:20,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:20,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:20,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:20,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:20,228 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:20,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-08-18 16:23:20,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1d1ceb59/5eb05d7c16ff4d2a8bb1fee71e25c697/FLAG0a94d9e47 [2020-08-18 16:23:20,779 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:20,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condnf.c [2020-08-18 16:23:20,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1d1ceb59/5eb05d7c16ff4d2a8bb1fee71e25c697/FLAG0a94d9e47 [2020-08-18 16:23:21,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1d1ceb59/5eb05d7c16ff4d2a8bb1fee71e25c697 [2020-08-18 16:23:21,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:21,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:21,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:21,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:21,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:21,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436f0f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21, skipping insertion in model container [2020-08-18 16:23:21,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:21,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:21,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:21,392 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:21,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:21,423 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:21,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21 WrapperNode [2020-08-18 16:23:21,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:21,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:21,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:21,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:21,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (1/1) ... [2020-08-18 16:23:21,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:21,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:21,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:21,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:21,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (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 [2020-08-18 16:23:21,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:21,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:21,598 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:21,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:21,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:21,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:21,881 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:21,881 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:23:21,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:21 BoogieIcfgContainer [2020-08-18 16:23:21,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:21,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:21,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:21,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:21,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:21" (1/3) ... [2020-08-18 16:23:21,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c96cd1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:21, skipping insertion in model container [2020-08-18 16:23:21,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:21" (2/3) ... [2020-08-18 16:23:21,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c96cd1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:21, skipping insertion in model container [2020-08-18 16:23:21,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:21" (3/3) ... [2020-08-18 16:23:21,907 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-08-18 16:23:21,932 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:21,946 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:21,962 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:21,988 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:21,989 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:21,989 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:21,989 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:21,989 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:21,989 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:21,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:21,990 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 16:23:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:23:22,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:22,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:22,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-08-18 16:23:22,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:22,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381194248] [2020-08-18 16:23:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:22,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381194248] [2020-08-18 16:23:22,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:22,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:23:22,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644580694] [2020-08-18 16:23:22,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:23:22,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:22,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:23:22,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:22,270 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 16:23:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:22,393 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-08-18 16:23:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:23:22,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:23:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:22,405 INFO L225 Difference]: With dead ends: 60 [2020-08-18 16:23:22,405 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 16:23:22,410 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 [2020-08-18 16:23:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 16:23:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 16:23:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 16:23:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 16:23:22,456 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-18 16:23:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:22,457 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 16:23:22,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:23:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 16:23:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:23:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:22,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:22,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:22,460 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2111179248, now seen corresponding path program 1 times [2020-08-18 16:23:22,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:22,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959454226] [2020-08-18 16:23:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:22,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959454226] [2020-08-18 16:23:22,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:22,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:23:22,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707203890] [2020-08-18 16:23:22,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:23:22,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:23:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:22,620 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-18 16:23:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:22,783 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-08-18 16:23:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:23:22,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 16:23:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:22,787 INFO L225 Difference]: With dead ends: 54 [2020-08-18 16:23:22,787 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 16:23:22,788 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 [2020-08-18 16:23:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 16:23:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-18 16:23:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 16:23:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 16:23:22,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-08-18 16:23:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:22,804 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 16:23:22,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:23:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 16:23:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:23:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:22,806 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] [2020-08-18 16:23:22,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:22,806 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-08-18 16:23:22,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:22,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190298164] [2020-08-18 16:23:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:23:22,853 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:23:22,854 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:22,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:23:22,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:22 BoogieIcfgContainer [2020-08-18 16:23:22,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:22,882 INFO L168 Benchmark]: Toolchain (without parser) took 1738.79 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 101.5 MB in the beginning and 105.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,883 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.19 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,886 INFO L168 Benchmark]: Boogie Preprocessor took 111.95 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,886 INFO L168 Benchmark]: RCFGBuilder took 349.69 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 162.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,887 INFO L168 Benchmark]: TraceAbstraction took 989.35 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 105.9 MB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,891 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 140.0 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.19 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 91.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.95 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.0 MB in the beginning and 179.3 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.69 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 162.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 989.35 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 105.9 MB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 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] int *a = malloc(sizeof(int)*N); [L28] i=0 [L28] COND TRUE i N [L36] EXPR a[i] [L36] a[i] = a[i] [L33] i++ [L33] COND FALSE !(i