/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=0.8 -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 [2020-08-19 01:55:12,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:55:12,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:55:12,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:55:12,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:55:12,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:55:12,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:55:12,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:55:12,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:55:12,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:55:12,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:55:12,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:55:12,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:55:12,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:55:12,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:55:12,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:55:12,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:55:12,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:55:12,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:55:12,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:55:12,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:55:12,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:55:12,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:55:12,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:55:12,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:55:12,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:55:12,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:55:12,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:55:12,558 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 01:55:12,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:55:12,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:55:12,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:55:12,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:55:12,610 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:55:12,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:55:12,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:55:12,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:55:12,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:55:12,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:55:12,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:55:12,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:55:12,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:55:12,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:55:12,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:55:12,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:55:12,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:55:12,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:55:12,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:55:12,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:55:12,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:55:12,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:55:12,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:55:12,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:55:12,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:55:12,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:55:12,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:55:12,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:55:12,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:55:12,617 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=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:55:12,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:55:12,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:55:12,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:55:12,964 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:55:12,965 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:55:12,966 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-19 01:55:13,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2e43170f/5bac5180868e4367bc68288512b0d2b1/FLAGd36fd2e79 [2020-08-19 01:55:13,486 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:55:13,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_4.c [2020-08-19 01:55:13,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2e43170f/5bac5180868e4367bc68288512b0d2b1/FLAGd36fd2e79 [2020-08-19 01:55:13,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b2e43170f/5bac5180868e4367bc68288512b0d2b1 [2020-08-19 01:55:13,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:55:13,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:55:13,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:13,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:55:13,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:55:13,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:13" (1/1) ... [2020-08-19 01:55:13,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dccfc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:13, skipping insertion in model container [2020-08-19 01:55:13,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:55:13" (1/1) ... [2020-08-19 01:55:13,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:55:13,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:55:14,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:14,101 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:55:14,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:55:14,129 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:55:14,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14 WrapperNode [2020-08-19 01:55:14,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:55:14,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:55:14,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:55:14,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:55:14,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (1/1) ... [2020-08-19 01:55:14,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:55:14,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:55:14,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:55:14,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:55:14,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (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 01:55:14,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:55:14,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:55:14,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:55:14,315 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-08-19 01:55:14,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:55:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:55:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:55:14,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:55:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-08-19 01:55:14,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:55:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:55:14,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:55:14,526 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:55:14,527 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:55:14,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:14 BoogieIcfgContainer [2020-08-19 01:55:14,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:55:14,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:55:14,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:55:14,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:55:14,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:55:13" (1/3) ... [2020-08-19 01:55:14,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3afba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:14, skipping insertion in model container [2020-08-19 01:55:14,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:55:14" (2/3) ... [2020-08-19 01:55:14,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3afba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:55:14, skipping insertion in model container [2020-08-19 01:55:14,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:55:14" (3/3) ... [2020-08-19 01:55:14,539 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-08-19 01:55:14,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:55:14,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:55:14,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:55:14,595 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:55:14,595 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:55:14,595 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:55:14,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:55:14,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:55:14,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:55:14,596 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:55:14,596 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:55:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-19 01:55:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:55:14,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:14,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:55:14,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-08-19 01:55:14,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:14,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754044778] [2020-08-19 01:55:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:14,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:55:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:14,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:55:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:55:14,837 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 01:55:14,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754044778] [2020-08-19 01:55:14,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:55:14,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:55:14,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751696862] [2020-08-19 01:55:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 01:55:14,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:55:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 01:55:14,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 01:55:14,874 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-08-19 01:55:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:55:14,956 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-08-19 01:55:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 01:55:14,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-19 01:55:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:55:14,977 INFO L225 Difference]: With dead ends: 55 [2020-08-19 01:55:14,977 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 01:55:14,983 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 [2020-08-19 01:55:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 01:55:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-08-19 01:55:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 01:55:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-08-19 01:55:15,045 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-08-19 01:55:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:55:15,046 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-08-19 01:55:15,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 01:55:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-08-19 01:55:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 01:55:15,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:55:15,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:55:15,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:55:15,049 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:55:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:55:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-08-19 01:55:15,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:55:15,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077629011] [2020-08-19 01:55:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:55:15,066 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-19 01:55:15,066 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-19 01:55:15,067 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 01:55:15,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:55:15,092 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-19 01:55:15,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:55:15 BoogieIcfgContainer [2020-08-19 01:55:15,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:55:15,099 INFO L168 Benchmark]: Toolchain (without parser) took 1195.86 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 140.5 MB in the end (delta: -37.2 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,104 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.77 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,110 INFO L168 Benchmark]: Boogie Preprocessor took 116.52 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 180.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,115 INFO L168 Benchmark]: RCFGBuilder took 283.62 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 167.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,119 INFO L168 Benchmark]: TraceAbstraction took 560.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.4 MB in the beginning and 140.5 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:55:15,132 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.77 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.52 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 180.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.62 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 167.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 560.41 ms. Allocated memory is still 202.9 MB. Free memory was 167.4 MB in the beginning and 140.5 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...