/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:58,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:58,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:58,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:33:58,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:58,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:58,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:58,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:58,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:58,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:58,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:58,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:58,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:58,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:58,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:58,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:58,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:58,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:58,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:58,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:58,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:33:58,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:58,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:58,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:58,773 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:58,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:58,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:58,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:58,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:58,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:58,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:58,775 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:58,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:58,775 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:58,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:58,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:58,776 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:58,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:58,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:58,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:58,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:58,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:58,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:58,777 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:59,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:59,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:59,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:59,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:59,065 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:59,065 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-22 18:33:59,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcdc8981/37bb86de5c3749a1855a7f9f816256f7/FLAG2a86b6694 [2020-08-22 18:33:59,568 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:59,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-08-22 18:33:59,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcdc8981/37bb86de5c3749a1855a7f9f816256f7/FLAG2a86b6694 [2020-08-22 18:33:59,951 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfcdc8981/37bb86de5c3749a1855a7f9f816256f7 [2020-08-22 18:33:59,959 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:59,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:59,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:59,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:59,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:59,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:59" (1/1) ... [2020-08-22 18:33:59,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db1276a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:59, skipping insertion in model container [2020-08-22 18:33:59,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:59" (1/1) ... [2020-08-22 18:33:59,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:59,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:34:00,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:34:00,146 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:34:00,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:34:00,177 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:34:00,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00 WrapperNode [2020-08-22 18:34:00,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:34:00,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:34:00,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:34:00,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:34:00,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... [2020-08-22 18:34:00,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:34:00,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:34:00,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:34:00,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:34:00,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 18:34:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:34:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:34:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-08-22 18:34:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:34:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:34:00,572 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:34:00,572 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:34:00,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:34:00 BoogieIcfgContainer [2020-08-22 18:34:00,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:34:00,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:34:00,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:34:00,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:34:00,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:59" (1/3) ... [2020-08-22 18:34:00,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b370b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:34:00, skipping insertion in model container [2020-08-22 18:34:00,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:34:00" (2/3) ... [2020-08-22 18:34:00,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b370b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:34:00, skipping insertion in model container [2020-08-22 18:34:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:34:00" (3/3) ... [2020-08-22 18:34:00,585 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-08-22 18:34:00,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:34:00,604 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:34:00,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:34:00,644 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:34:00,644 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:34:00,644 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:34:00,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:34:00,645 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:34:00,645 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:34:00,645 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:34:00,645 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:34:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-08-22 18:34:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 18:34:00,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:34:00,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:34:00,674 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:34:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:34:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-08-22 18:34:00,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:34:00,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040649098] [2020-08-22 18:34:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:34:00,752 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:34:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:00,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:34:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:00,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 18:34:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:34:00,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040649098] [2020-08-22 18:34:00,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:34:00,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:34:00,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130997961] [2020-08-22 18:34:00,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:34:00,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:34:00,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:34:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:34:00,998 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-08-22 18:34:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:34:01,162 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-08-22 18:34:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:34:01,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 18:34:01,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:34:01,176 INFO L225 Difference]: With dead ends: 60 [2020-08-22 18:34:01,176 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 18:34:01,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:34:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 18:34:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 18:34:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 18:34:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-08-22 18:34:01,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-08-22 18:34:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:34:01,233 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-08-22 18:34:01,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:34:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-08-22 18:34:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:34:01,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:34:01,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:34:01,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:34:01,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:34:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:34:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-08-22 18:34:01,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:34:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72090884] [2020-08-22 18:34:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:34:01,241 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:34:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:01,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:34:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:01,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 18:34:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:34:01,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72090884] [2020-08-22 18:34:01,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:34:01,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:34:01,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318820693] [2020-08-22 18:34:01,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:34:01,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:34:01,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:34:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:34:01,343 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-08-22 18:34:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:34:01,414 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-08-22 18:34:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:34:01,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 18:34:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:34:01,417 INFO L225 Difference]: With dead ends: 46 [2020-08-22 18:34:01,417 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 18:34:01,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:34:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 18:34:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-22 18:34:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 18:34:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-08-22 18:34:01,432 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-08-22 18:34:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:34:01,433 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-08-22 18:34:01,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:34:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-08-22 18:34:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 18:34:01,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:34:01,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:34:01,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:34:01,436 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:34:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:34:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-08-22 18:34:01,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:34:01,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682624076] [2020-08-22 18:34:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:34:01,570 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:34:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:34:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:34:01,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 18:34:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:34:01,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:34:01,684 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: has to be unsat by construction, we do check only for interpolant computation at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:100) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:294) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:34:01,689 INFO L168 Benchmark]: Toolchain (without parser) took 1728.19 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 105.0 MB in the beginning and 94.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,690 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.68 ms. Allocated memory is still 140.5 MB. Free memory was 104.8 MB in the beginning and 95.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,692 INFO L168 Benchmark]: Boogie Preprocessor took 107.02 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 95.3 MB in the beginning and 182.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,693 INFO L168 Benchmark]: RCFGBuilder took 291.85 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 168.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,694 INFO L168 Benchmark]: TraceAbstraction took 1107.84 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 94.5 MB in the end (delta: 73.4 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:34:01,709 INFO L336 ainManager$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 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 216.68 ms. Allocated memory is still 140.5 MB. Free memory was 104.8 MB in the beginning and 95.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.02 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 95.3 MB in the beginning and 182.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.85 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 168.5 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1107.84 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 94.5 MB in the end (delta: 73.4 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: has to be unsat by construction, we do check only for interpolant computation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: has to be unsat by construction, we do check only for interpolant computation: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...