/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:34:55,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:34:55,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:34:55,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:34:55,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:34:55,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:34:55,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:34:55,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:34:55,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:34:55,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:34:55,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:34:55,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:34:55,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:34:55,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:34:55,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:34:55,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:34:55,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:34:55,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:34:55,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:34:55,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:34:55,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:34:55,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:34:55,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:34:55,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:34:55,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:34:55,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:34:55,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:34:55,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:34:55,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:34:55,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:34:55,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:34:55,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:34:55,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:34:55,640 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:34:55,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:34:55,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:34:55,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:34:55,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:34:55,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:34:55,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:34:55,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:34:55,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:34:55,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:34:55,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:34:55,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:34:55,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:34:55,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:34:55,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:34:55,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:34:55,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:34:55,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:34:55,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:34:55,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:34:55,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:34:55,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:34:55,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:34:55,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:34:55,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:34:55,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:34:55,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:34:55,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:34:55,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:34:55,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:34:55,967 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:34:55,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-08-22 16:34:56,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642525f31/e2d07d49cf9a41e3a760ad8441203f57/FLAG6fa7c9a01 [2020-08-22 16:34:56,499 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:34:56,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-08-22 16:34:56,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642525f31/e2d07d49cf9a41e3a760ad8441203f57/FLAG6fa7c9a01 [2020-08-22 16:34:56,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642525f31/e2d07d49cf9a41e3a760ad8441203f57 [2020-08-22 16:34:56,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:34:56,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:34:56,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:34:56,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:34:56,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:34:56,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:34:56" (1/1) ... [2020-08-22 16:34:56,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d927774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:56, skipping insertion in model container [2020-08-22 16:34:56,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:34:56" (1/1) ... [2020-08-22 16:34:56,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:34:56,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:34:57,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:34:57,105 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:34:57,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:34:57,130 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:34:57,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57 WrapperNode [2020-08-22 16:34:57,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:34:57,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:34:57,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:34:57,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:34:57,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (1/1) ... [2020-08-22 16:34:57,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:34:57,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:34:57,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:34:57,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:34:57,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (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 16:34:57,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:34:57,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:34:57,298 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:34:57,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:34:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:34:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:34:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:34:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:34:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:34:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:34:57,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:34:57,475 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:34:57,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:34:57 BoogieIcfgContainer [2020-08-22 16:34:57,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:34:57,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:34:57,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:34:57,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:34:57,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:34:56" (1/3) ... [2020-08-22 16:34:57,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2635ad5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:34:57, skipping insertion in model container [2020-08-22 16:34:57,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:34:57" (2/3) ... [2020-08-22 16:34:57,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2635ad5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:34:57, skipping insertion in model container [2020-08-22 16:34:57,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:34:57" (3/3) ... [2020-08-22 16:34:57,488 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-08-22 16:34:57,496 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:34:57,504 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:34:57,518 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:34:57,544 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:34:57,544 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:34:57,544 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:34:57,544 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:34:57,545 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:34:57,545 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:34:57,545 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:34:57,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:34:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-22 16:34:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:34:57,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:57,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:57,572 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-08-22 16:34:57,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:57,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069604430] [2020-08-22 16:34:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:57,842 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 16:34:57,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069604430] [2020-08-22 16:34:57,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:34:57,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:34:57,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253566418] [2020-08-22 16:34:57,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:34:57,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:34:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:34:57,876 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-08-22 16:34:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:57,986 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 16:34:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:34:57,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:34:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:58,000 INFO L225 Difference]: With dead ends: 33 [2020-08-22 16:34:58,001 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 16:34:58,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:34:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 16:34:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 16:34:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 16:34:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-22 16:34:58,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-08-22 16:34:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:58,060 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-22 16:34:58,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:34:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-22 16:34:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:34:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:58,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:58,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:34:58,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:58,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-08-22 16:34:58,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:58,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496157459] [2020-08-22 16:34:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:34:58,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496157459] [2020-08-22 16:34:58,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:34:58,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:34:58,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058607223] [2020-08-22 16:34:58,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:34:58,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:34:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:34:58,234 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-08-22 16:34:58,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:58,256 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-08-22 16:34:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:34:58,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 16:34:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:58,258 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:34:58,259 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:34:58,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:34:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:34:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-22 16:34:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 16:34:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-22 16:34:58,268 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2020-08-22 16:34:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:58,268 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-22 16:34:58,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:34:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-22 16:34:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:34:58,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:58,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:58,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:34:58,270 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-08-22 16:34:58,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:58,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185610265] [2020-08-22 16:34:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:34:58,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185610265] [2020-08-22 16:34:58,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315074388] [2020-08-22 16:34:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-08-22 16:34:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:34:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:34:58,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:34:58,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-08-22 16:34:58,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232609649] [2020-08-22 16:34:58,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:34:58,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:58,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:34:58,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:34:58,689 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-08-22 16:34:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:58,755 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-22 16:34:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:34:58,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-08-22 16:34:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:58,758 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:34:58,758 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 16:34:58,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:34:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 16:34:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-08-22 16:34:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 16:34:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-08-22 16:34:58,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-08-22 16:34:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:58,767 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-08-22 16:34:58,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:34:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-08-22 16:34:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 16:34:58,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:58,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:58,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:34:58,984 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-08-22 16:34:58,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:58,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621077560] [2020-08-22 16:34:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:34:59,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621077560] [2020-08-22 16:34:59,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216768575] [2020-08-22 16:34:59,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:59,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:34:59,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:34:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:34:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:34:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:34:59,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:34:59,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-08-22 16:34:59,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653192443] [2020-08-22 16:34:59,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:34:59,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:34:59,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:34:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:34:59,356 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-08-22 16:34:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:34:59,476 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-08-22 16:34:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:34:59,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-08-22 16:34:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:34:59,480 INFO L225 Difference]: With dead ends: 41 [2020-08-22 16:34:59,480 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:34:59,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:34:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:34:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 16:34:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:34:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-22 16:34:59,494 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-08-22 16:34:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:34:59,495 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-22 16:34:59,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:34:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-22 16:34:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:34:59,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:34:59,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:34:59,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:59,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:34:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:34:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2020-08-22 16:34:59,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:34:59,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267778772] [2020-08-22 16:34:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:34:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:34:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:34:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:34:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:34:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:34:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267778772] [2020-08-22 16:34:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898633536] [2020-08-22 16:34:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:34:59,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-08-22 16:34:59,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:34:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:34:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-22 16:35:00,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:35:00,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-08-22 16:35:00,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763179636] [2020-08-22 16:35:00,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:00,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:00,052 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-08-22 16:35:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:00,063 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-08-22 16:35:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:00,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 16:35:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:00,065 INFO L225 Difference]: With dead ends: 27 [2020-08-22 16:35:00,065 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 16:35:00,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 16:35:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 16:35:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 16:35:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 16:35:00,068 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-08-22 16:35:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:00,069 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 16:35:00,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 16:35:00,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 16:35:00,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:00,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 16:35:00,301 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 16:35:00,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:35:00,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 16:35:00,302 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 16:35:00,302 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 16:35:00,302 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 16:35:00,303 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-08-22 16:35:00,303 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-08-22 16:35:00,303 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-08-22 16:35:00,303 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-22 16:35:00,303 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-08-22 16:35:00,303 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-08-22 16:35:00,303 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-22 16:35:00,304 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-08-22 16:35:00,305 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-08-22 16:35:00,305 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-08-22 16:35:00,305 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-08-22 16:35:00,305 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-22 16:35:00,305 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-08-22 16:35:00,305 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 16:35:00,306 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-22 16:35:00,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:35:00 BoogieIcfgContainer [2020-08-22 16:35:00,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:35:00,318 INFO L168 Benchmark]: Toolchain (without parser) took 3413.32 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 103.2 MB in the beginning and 108.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 90.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,320 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.64 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,328 INFO L168 Benchmark]: Boogie Preprocessor took 102.96 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 182.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,329 INFO L168 Benchmark]: RCFGBuilder took 244.18 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 170.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,330 INFO L168 Benchmark]: TraceAbstraction took 2834.04 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 108.5 MB in the end (delta: 61.5 MB). Peak memory consumption was 94.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:00,343 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.64 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.96 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 182.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.18 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 170.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2834.04 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 108.5 MB in the end (delta: 61.5 MB). Peak memory consumption was 94.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 8 SDslu, 432 SDs, 0 SdLazy, 107 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 195 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 14343 SizeOfPredicates, 7 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 76/108 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...