/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 --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:11:39,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:11:39,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:11:39,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:11:39,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:11:39,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:11:39,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:11:39,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:11:39,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:11:39,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:11:39,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:11:39,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:11:39,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:11:39,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:11:39,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:11:39,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:11:39,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:11:39,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:11:39,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:11:39,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:11:39,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:11:39,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:11:39,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:11:39,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:11:39,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:11:39,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:11:39,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:11:39,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:11:39,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:11:39,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 17:11:39,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:11:39,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:11:39,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:11:39,375 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 17:11:39,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:11:39,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:11:39,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:11:39,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:11:39,403 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:11:39,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:11:39,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:11:39,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:11:39,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:11:39,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:11:39,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:11:39,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:11:39,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:11:39,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:11:39,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:11:39,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:11:39,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:11:39,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:11:39,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:11:39,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:11:39,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:11:39,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:11:39,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:11:39,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:11:39,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:11:39,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:11:39,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:11:39,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:11:39,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:11:39,410 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:11:39,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:11:39,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:11:39,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:11:39,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:11:39,794 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:11:39,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn5f.c [2020-08-18 17:11:39,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae9171319/5b2d1d7ef2234ca0b987f6526af7815c/FLAG7f3c2f397 [2020-08-18 17:11:40,356 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:11:40,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ifeqn5f.c [2020-08-18 17:11:40,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae9171319/5b2d1d7ef2234ca0b987f6526af7815c/FLAG7f3c2f397 [2020-08-18 17:11:40,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae9171319/5b2d1d7ef2234ca0b987f6526af7815c [2020-08-18 17:11:40,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:11:40,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:11:40,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:11:40,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:11:40,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:11:40,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:40,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cac9c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40, skipping insertion in model container [2020-08-18 17:11:40,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:40,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:11:40,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:11:40,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:11:40,955 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:11:40,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:11:40,995 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:11:40,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40 WrapperNode [2020-08-18 17:11:40,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:11:40,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:11:40,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:11:40,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:11:41,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (1/1) ... [2020-08-18 17:11:41,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:11:41,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:11:41,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:11:41,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:11:41,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (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 17:11:41,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:11:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:11:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 17:11:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 17:11:41,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:11:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:11:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:11:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 17:11:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:11:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:11:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:11:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:11:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:11:41,546 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:11:41,546 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 17:11:41,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:11:41 BoogieIcfgContainer [2020-08-18 17:11:41,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:11:41,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:11:41,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:11:41,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:11:41,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:11:40" (1/3) ... [2020-08-18 17:11:41,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e00f119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:11:41, skipping insertion in model container [2020-08-18 17:11:41,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:11:40" (2/3) ... [2020-08-18 17:11:41,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e00f119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:11:41, skipping insertion in model container [2020-08-18 17:11:41,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:11:41" (3/3) ... [2020-08-18 17:11:41,558 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn5f.c [2020-08-18 17:11:41,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:11:41,574 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:11:41,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:11:41,607 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:11:41,607 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:11:41,607 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:11:41,608 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:11:41,608 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:11:41,608 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:11:41,608 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:11:41,608 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:11:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 17:11:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:11:41,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:11:41,629 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 17:11:41,630 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:11:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:11:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-18 17:11:41,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:11:41,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914410332] [2020-08-18 17:11:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:11:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:11:41,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:11:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:11:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 17:11:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:11:41,828 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 17:11:41,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914410332] [2020-08-18 17:11:41,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:11:41,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:11:41,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637017520] [2020-08-18 17:11:41,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:11:41,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:11:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:11:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:11:41,852 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-18 17:11:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:11:41,991 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-18 17:11:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:11:41,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:11:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:11:42,006 INFO L225 Difference]: With dead ends: 62 [2020-08-18 17:11:42,007 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 17:11:42,011 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 17:11:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 17:11:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 17:11:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 17:11:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 17:11:42,049 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-18 17:11:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:11:42,049 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 17:11:42,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:11:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 17:11:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:11:42,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:11:42,050 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 17:11:42,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:11:42,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:11:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:11:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-18 17:11:42,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:11:42,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279441914] [2020-08-18 17:11:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:11:42,077 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 17:11:42,077 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 17:11:42,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:11:42,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:11:42,098 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 17:11:42,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:11:42 BoogieIcfgContainer [2020-08-18 17:11:42,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:11:42,102 INFO L168 Benchmark]: Toolchain (without parser) took 1382.24 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 101.5 MB in the beginning and 127.5 MB in the end (delta: -26.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:11:42,103 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 17:11:42,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.89 ms. Allocated memory is still 138.9 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 17:11:42,105 INFO L168 Benchmark]: Boogie Preprocessor took 128.54 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 91.0 MB in the beginning and 177.2 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:11:42,106 INFO L168 Benchmark]: RCFGBuilder took 425.15 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 159.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:11:42,107 INFO L168 Benchmark]: TraceAbstraction took 547.70 ms. Allocated memory is still 199.8 MB. Free memory was 159.1 MB in the beginning and 127.5 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:11:42,112 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.89 ms. Allocated memory is still 138.9 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 128.54 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 91.0 MB in the beginning and 177.2 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.15 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 159.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 547.70 ms. Allocated memory is still 199.8 MB. Free memory was 159.1 MB in the beginning and 127.5 MB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 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