/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=BIGGEST -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 17:50:46,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:50:46,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:50:46,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:50:46,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:46,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:46,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:46,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:46,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:46,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:46,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:46,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:46,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:46,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:46,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:46,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:46,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:46,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:46,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:46,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:46,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:46,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:46,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:46,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:46,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:50:46,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:46,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:46,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:46,683 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 17:50:46,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:46,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:46,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:46,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:46,724 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:46,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:46,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:46,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:46,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:46,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:46,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:46,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:46,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:46,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:46,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:46,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:46,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:46,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:46,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:46,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:46,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:46,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:46,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:46,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:46,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:46,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:46,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:46,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:46,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:46,731 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:47,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:47,022 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:47,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:47,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:47,037 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:47,038 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-18 17:50:47,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06056907b/822eff39bcd64ecfab12d6283e117065/FLAG2fc809c27 [2020-08-18 17:50:47,594 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:47,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-18 17:50:47,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06056907b/822eff39bcd64ecfab12d6283e117065/FLAG2fc809c27 [2020-08-18 17:50:47,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06056907b/822eff39bcd64ecfab12d6283e117065 [2020-08-18 17:50:47,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:47,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:47,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:47,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:47,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:47,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:47" (1/1) ... [2020-08-18 17:50:47,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6e6de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:47, skipping insertion in model container [2020-08-18 17:50:47,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:47" (1/1) ... [2020-08-18 17:50:47,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:47,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:48,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:48,178 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:48,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:48,208 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:48,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48 WrapperNode [2020-08-18 17:50:48,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:48,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:48,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:48,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:48,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (1/1) ... [2020-08-18 17:50:48,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:48,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:48,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:48,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:48,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (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 17:50:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 17:50:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-08-18 17:50:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:50:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 17:50:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-08-18 17:50:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:48,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:48,592 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:50:48,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:48 BoogieIcfgContainer [2020-08-18 17:50:48,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:48,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:48,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:48,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:48,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:47" (1/3) ... [2020-08-18 17:50:48,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3cfd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:48, skipping insertion in model container [2020-08-18 17:50:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:48" (2/3) ... [2020-08-18 17:50:48,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3cfd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:48, skipping insertion in model container [2020-08-18 17:50:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:48" (3/3) ... [2020-08-18 17:50:48,605 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-08-18 17:50:48,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:48,624 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:48,640 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:48,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:48,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:48,689 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:48,690 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:48,690 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:48,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:48,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:48,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-18 17:50:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:50:48,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:48,724 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 17:50:48,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-08-18 17:50:48,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:48,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253350641] [2020-08-18 17:50:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:48,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:48,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:48,935 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 17:50:48,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253350641] [2020-08-18 17:50:48,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:48,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:50:48,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621732217] [2020-08-18 17:50:48,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:48,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:48,958 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-08-18 17:50:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:49,038 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-08-18 17:50:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:50:49,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-18 17:50:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:49,061 INFO L225 Difference]: With dead ends: 55 [2020-08-18 17:50:49,061 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 17:50:49,072 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 17:50:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 17:50:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-08-18 17:50:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 17:50:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-08-18 17:50:49,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-08-18 17:50:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:49,114 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-08-18 17:50:49,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-08-18 17:50:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:50:49,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:49,117 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 17:50:49,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:49,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-08-18 17:50:49,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:49,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472376780] [2020-08-18 17:50:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:49,133 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 17:50:49,133 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 17:50:49,134 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:50:49,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:49,154 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 17:50:49,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:50:49 BoogieIcfgContainer [2020-08-18 17:50:49,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:50:49,157 INFO L168 Benchmark]: Toolchain (without parser) took 1193.27 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.5 MB in the beginning and 142.6 MB in the end (delta: -38.1 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,158 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.72 ms. Allocated memory is still 141.6 MB. Free memory was 104.1 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,161 INFO L168 Benchmark]: Boogie Preprocessor took 112.19 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 183.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,162 INFO L168 Benchmark]: RCFGBuilder took 274.64 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 170.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,163 INFO L168 Benchmark]: TraceAbstraction took 556.39 ms. Allocated memory is still 205.0 MB. Free memory was 169.2 MB in the beginning and 142.6 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:49,167 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.72 ms. Allocated memory is still 141.6 MB. Free memory was 104.1 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.19 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 183.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.64 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 170.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 556.39 ms. Allocated memory is still 205.0 MB. Free memory was 169.2 MB in the beginning and 142.6 MB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 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, 0.0s 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...