/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=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:52:26,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:52:26,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:52:26,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 21:52:26,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:52:26,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:52:26,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:52:26,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:52:26,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:52:26,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:52:26,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:52:26,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:52:26,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:52:26,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:52:26,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:52:26,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:52:26,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:52:26,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:52:26,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:52:26,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:52:26,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:52:26,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 21:52:26,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:52:26,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:52:26,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:52:26,935 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 21:52:26,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:52:26,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:52:26,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:52:26,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:52:26,966 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:52:26,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:52:26,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:52:26,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:52:26,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:52:26,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:52:26,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:52:26,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:52:26,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:52:26,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:52:26,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:52:26,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:52:26,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:52:26,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:52:26,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:52:26,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:52:26,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:52:26,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:52:26,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:52:26,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:52:26,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:52:26,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:52:26,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:52:26,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:52:26,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:52:26,976 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:52:27,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:52:27,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:52:27,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:52:27,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:52:27,334 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:52:27,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-18 21:52:27,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f16ae4c26/bfce581abae54b52abaa3da939be7919/FLAGb7ae49171 [2020-08-18 21:52:27,861 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:52:27,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-18 21:52:27,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f16ae4c26/bfce581abae54b52abaa3da939be7919/FLAGb7ae49171 [2020-08-18 21:52:28,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f16ae4c26/bfce581abae54b52abaa3da939be7919 [2020-08-18 21:52:28,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:52:28,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:52:28,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:52:28,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:52:28,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:52:28,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347c51ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28, skipping insertion in model container [2020-08-18 21:52:28,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:52:28,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:52:28,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:52:28,467 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:52:28,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:52:28,499 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:52:28,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28 WrapperNode [2020-08-18 21:52:28,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:52:28,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:52:28,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:52:28,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:52:28,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (1/1) ... [2020-08-18 21:52:28,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:52:28,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:52:28,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:52:28,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:52:28,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (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 21:52:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:52:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:52:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-08-18 21:52:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:52:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:52:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:52:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-08-18 21:52:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:52:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:52:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:52:28,881 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:52:28,881 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:52:28,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:52:28 BoogieIcfgContainer [2020-08-18 21:52:28,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:52:28,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:52:28,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:52:28,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:52:28,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:52:28" (1/3) ... [2020-08-18 21:52:28,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfdbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:52:28, skipping insertion in model container [2020-08-18 21:52:28,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:52:28" (2/3) ... [2020-08-18 21:52:28,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cfdbd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:52:28, skipping insertion in model container [2020-08-18 21:52:28,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:52:28" (3/3) ... [2020-08-18 21:52:28,893 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-08-18 21:52:28,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:52:28,912 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:52:28,939 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:52:29,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:52:29,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:52:29,000 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:52:29,000 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:52:29,003 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:52:29,003 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:52:29,003 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:52:29,003 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:52:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-18 21:52:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:52:29,033 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:29,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:29,034 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:29,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-08-18 21:52:29,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:29,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813883002] [2020-08-18 21:52:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:29,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:52:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:29,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:52:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:52:29,254 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 21:52:29,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813883002] [2020-08-18 21:52:29,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:52:29,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:52:29,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819082471] [2020-08-18 21:52:29,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:52:29,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:52:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:52:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:52:29,282 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-08-18 21:52:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:52:29,349 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-08-18 21:52:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:52:29,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-18 21:52:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:52:29,364 INFO L225 Difference]: With dead ends: 55 [2020-08-18 21:52:29,364 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 21:52:29,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:52:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 21:52:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-08-18 21:52:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 21:52:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-08-18 21:52:29,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-08-18 21:52:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:52:29,429 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-08-18 21:52:29,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:52:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-08-18 21:52:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:52:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:52:29,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:52:29,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:52:29,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:52:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:52:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-08-18 21:52:29,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:52:29,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582010725] [2020-08-18 21:52:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:52:29,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 21:52:29,452 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 21:52:29,452 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:52:29,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:52:29,472 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 21:52:29,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:52:29 BoogieIcfgContainer [2020-08-18 21:52:29,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:52:29,476 INFO L168 Benchmark]: Toolchain (without parser) took 1241.95 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 103.1 MB in the beginning and 140.0 MB in the end (delta: -37.0 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,481 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.36 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,484 INFO L168 Benchmark]: Boogie Preprocessor took 115.86 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 93.2 MB in the beginning and 181.7 MB in the end (delta: -88.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,485 INFO L168 Benchmark]: RCFGBuilder took 267.93 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 166.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,487 INFO L168 Benchmark]: TraceAbstraction took 586.70 ms. Allocated memory is still 201.9 MB. Free memory was 166.9 MB in the beginning and 140.0 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:52:29,492 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.36 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.86 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 93.2 MB in the beginning and 181.7 MB in the end (delta: -88.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.93 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 166.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 586.70 ms. Allocated memory is still 201.9 MB. Free memory was 166.9 MB in the beginning and 140.0 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: 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: [L32] long x; [L33] long y; [L34] long g; [L36] x = 63 [L37] y = 18 [L39] CALL, EXPR gcd_test(x, y) [L12] COND FALSE !(a < 0) [L13] COND TRUE b < 0 [L13] b = -b [L15] COND TRUE a == 0 [L16] return b; [L39] RET, EXPR gcd_test(x, y) [L39] g = gcd_test(x, y) [L41] CALL __VERIFIER_assert(x % g == 0) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 10 SDslu, 54 SDs, 0 SdLazy, 14 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...