/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/ifeqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:22,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:22,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:22,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:22,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:22,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:22,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:22,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:22,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:22,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:22,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:22,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:22,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:22,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:22,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:22,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:22,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:22,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:22,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:22,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:22,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:22,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:22,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:22,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:22,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:22,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:22,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:22,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:22,813 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 16:23:22,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:22,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:22,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:22,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:22,864 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:22,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:22,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:22,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:22,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:22,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:22,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:22,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:22,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:22,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:22,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:22,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:22,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:22,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:22,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:22,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:22,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:22,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:22,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:22,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:22,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:22,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:22,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:22,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:22,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:22,871 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 16:23:23,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:23,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:23,190 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:23,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:23,192 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:23,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-08-18 16:23:23,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64e23489/84908d18324f4d3b8990a39a09d53051/FLAG6683d2da7 [2020-08-18 16:23:23,700 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:23,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-08-18 16:23:23,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64e23489/84908d18324f4d3b8990a39a09d53051/FLAG6683d2da7 [2020-08-18 16:23:24,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b64e23489/84908d18324f4d3b8990a39a09d53051 [2020-08-18 16:23:24,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:24,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:24,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:24,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:24,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:24,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83bebeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24, skipping insertion in model container [2020-08-18 16:23:24,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:24,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:24,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:24,363 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:24,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:24,397 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:24,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24 WrapperNode [2020-08-18 16:23:24,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:24,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:24,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:24,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:24,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (1/1) ... [2020-08-18 16:23:24,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:24,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:24,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:24,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:24,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (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 16:23:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:24,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:24,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:24,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:24,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:24,615 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:24,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:24,938 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:23:24,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:24 BoogieIcfgContainer [2020-08-18 16:23:24,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:24,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:24,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:24,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:24,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:24" (1/3) ... [2020-08-18 16:23:24,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70063aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:24, skipping insertion in model container [2020-08-18 16:23:24,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:24" (2/3) ... [2020-08-18 16:23:24,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70063aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:24, skipping insertion in model container [2020-08-18 16:23:24,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:24" (3/3) ... [2020-08-18 16:23:24,966 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn1f.c [2020-08-18 16:23:24,991 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:24,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:25,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:25,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:25,035 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:25,035 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:25,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:25,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:25,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:25,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:25,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 16:23:25,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:23:25,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:25,059 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 16:23:25,060 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-18 16:23:25,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:25,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82653171] [2020-08-18 16:23:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:25,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:25,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:25,354 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 16:23:25,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82653171] [2020-08-18 16:23:25,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:25,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:23:25,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163155598] [2020-08-18 16:23:25,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:23:25,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:23:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:25,390 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-18 16:23:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:25,551 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-18 16:23:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:23:25,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:23:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:25,562 INFO L225 Difference]: With dead ends: 62 [2020-08-18 16:23:25,563 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 16:23:25,566 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 16:23:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 16:23:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 16:23:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 16:23:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 16:23:25,609 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-18 16:23:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:25,610 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 16:23:25,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:23:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 16:23:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:23:25,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:25,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:23:25,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:25,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-18 16:23:25,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:25,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606776446] [2020-08-18 16:23:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:25,637 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 16:23:25,638 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 16:23:25,638 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:25,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:25,658 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 16:23:25,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:25 BoogieIcfgContainer [2020-08-18 16:23:25,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:25,661 INFO L168 Benchmark]: Toolchain (without parser) took 1516.46 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 103.2 MB in the beginning and 131.4 MB in the end (delta: -28.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,662 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.76 ms. Allocated memory is still 147.8 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,664 INFO L168 Benchmark]: Boogie Preprocessor took 154.70 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,665 INFO L168 Benchmark]: RCFGBuilder took 395.84 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,666 INFO L168 Benchmark]: TraceAbstraction took 706.16 ms. Allocated memory is still 203.9 MB. Free memory was 163.4 MB in the beginning and 131.4 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:25,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.76 ms. Allocated memory is still 147.8 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.70 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 92.5 MB in the beginning and 181.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.84 ms. Allocated memory is still 203.9 MB. Free memory was 181.2 MB in the beginning and 164.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 706.16 ms. Allocated memory is still 203.9 MB. Free memory was 163.4 MB in the beginning and 131.4 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible 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 *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND FALSE !(i