/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:16:29,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:16:29,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:16:29,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:16:29,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:16:29,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:16:29,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:16:29,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:16:29,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:16:29,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:16:29,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:16:29,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:16:29,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:16:29,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:16:29,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:16:29,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:16:29,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:16:29,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:16:29,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:16:29,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:16:29,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:16:29,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:16:29,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:16:29,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:16:29,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:16:29,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:16:29,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:16:29,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:16:29,776 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 [2020-08-19 01:16:29,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:16:29,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:16:29,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:16:29,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:16:29,814 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:16:29,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:16:29,815 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:16:29,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:16:29,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:16:29,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:16:29,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:16:29,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:16:29,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:16:29,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:16:29,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:16:29,818 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:16:29,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:16:29,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:16:29,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:16:29,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:16:29,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:16:29,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:16:29,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:16:29,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:16:29,821 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=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:16:30,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:16:30,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:16:30,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:16:30,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:16:30,170 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:16:30,171 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2020-08-19 01:16:30,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2c1f6d8/f31bb694a7c041c7bdf4bc92d865e376/FLAG47bcfcaf2 [2020-08-19 01:16:30,679 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:16:30,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex01-1.c [2020-08-19 01:16:30,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2c1f6d8/f31bb694a7c041c7bdf4bc92d865e376/FLAG47bcfcaf2 [2020-08-19 01:16:31,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b2c1f6d8/f31bb694a7c041c7bdf4bc92d865e376 [2020-08-19 01:16:31,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:16:31,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:16:31,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:31,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:16:31,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:16:31,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb1d53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31, skipping insertion in model container [2020-08-19 01:16:31,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:16:31,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:16:31,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:31,311 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:16:31,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:16:31,344 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:16:31,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31 WrapperNode [2020-08-19 01:16:31,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:16:31,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:16:31,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:16:31,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:16:31,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (1/1) ... [2020-08-19 01:16:31,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:16:31,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:16:31,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:16:31,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:16:31,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (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 [2020-08-19 01:16:31,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:16:31,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:16:31,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:16:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-19 01:16:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:16:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:16:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:16:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-19 01:16:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:16:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-19 01:16:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:16:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:16:31,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:16:31,725 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:16:31,725 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 01:16:31,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:31 BoogieIcfgContainer [2020-08-19 01:16:31,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:16:31,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:16:31,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:16:31,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:16:31,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:16:31" (1/3) ... [2020-08-19 01:16:31,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5131e413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:31, skipping insertion in model container [2020-08-19 01:16:31,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:16:31" (2/3) ... [2020-08-19 01:16:31,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5131e413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:16:31, skipping insertion in model container [2020-08-19 01:16:31,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:16:31" (3/3) ... [2020-08-19 01:16:31,737 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2020-08-19 01:16:31,752 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:16:31,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:16:31,777 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:16:31,809 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:16:31,809 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:16:31,809 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:16:31,810 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:16:31,810 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:16:31,810 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:16:31,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:16:31,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:16:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 01:16:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 01:16:31,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:31,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:31,851 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash -355556993, now seen corresponding path program 1 times [2020-08-19 01:16:31,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:31,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683836161] [2020-08-19 01:16:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:32,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:16:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:16:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:16:32,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683836161] [2020-08-19 01:16:32,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:16:32,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 01:16:32,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26901402] [2020-08-19 01:16:32,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 01:16:32,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:16:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 01:16:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 01:16:32,030 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-08-19 01:16:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:16:32,052 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-08-19 01:16:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 01:16:32,053 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-19 01:16:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:16:32,062 INFO L225 Difference]: With dead ends: 45 [2020-08-19 01:16:32,062 INFO L226 Difference]: Without dead ends: 16 [2020-08-19 01:16:32,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 01:16:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-19 01:16:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-19 01:16:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 01:16:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-19 01:16:32,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-08-19 01:16:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:16:32,103 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-19 01:16:32,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 01:16:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-19 01:16:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 01:16:32,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:16:32,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:16:32,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:16:32,105 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:16:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:16:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash -359251077, now seen corresponding path program 1 times [2020-08-19 01:16:32,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:16:32,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762027964] [2020-08-19 01:16:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:16:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 01:16:32,132 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 01:16:32,132 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:16:32,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:16:32,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:16:32 BoogieIcfgContainer [2020-08-19 01:16:32,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:16:32,152 INFO L168 Benchmark]: Toolchain (without parser) took 1051.19 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 105.3 MB in the beginning and 148.4 MB in the end (delta: -43.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,153 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.52 ms. Allocated memory is still 143.7 MB. Free memory was 104.9 MB in the beginning and 95.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,155 INFO L168 Benchmark]: Boogie Preprocessor took 119.15 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 95.4 MB in the beginning and 183.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,156 INFO L168 Benchmark]: RCFGBuilder took 264.79 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 170.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,157 INFO L168 Benchmark]: TraceAbstraction took 418.79 ms. Allocated memory is still 205.5 MB. Free memory was 170.1 MB in the beginning and 148.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:16:32,162 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 143.7 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.52 ms. Allocated memory is still 143.7 MB. Free memory was 104.9 MB in the beginning and 95.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.15 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 95.4 MB in the beginning and 183.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.79 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 170.7 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 418.79 ms. Allocated memory is still 205.5 MB. Free memory was 170.1 MB in the beginning and 148.4 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L34] _Bool c = __VERIFIER_nondet_bool(); [L35] COND FALSE !(\read(c)) [L38] CALL f(2) [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L13] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L14] COND FALSE !(!(k <= 1073741823)) [L17] COND FALSE !(z < k) [L18] CALL __VERIFIER_assert(z>=2) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...