/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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:21,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:21,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:21,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:21,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:21,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:21,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:21,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:21,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:21,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:21,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:21,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:21,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:21,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:21,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:21,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:21,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:21,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:21,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:21,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:21,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:21,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:21,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:21,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:21,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:21,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:21,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:21,988 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 [2020-07-07 10:56:22,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:22,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:22,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:22,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:22,004 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:22,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:22,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:22,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:22,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:22,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:22,006 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:22,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:22,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:22,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:22,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:22,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:22,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:22,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:22,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:22,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:22,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:22,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:22,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:22,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:22,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:22,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:22,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:22,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:22,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:22,297 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:22,299 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-07 10:56:22,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48bb7b03b/94bba088e5764891acc061aa599fee23/FLAGfb8a30e92 [2020-07-07 10:56:22,835 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:22,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-07 10:56:22,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48bb7b03b/94bba088e5764891acc061aa599fee23/FLAGfb8a30e92 [2020-07-07 10:56:23,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48bb7b03b/94bba088e5764891acc061aa599fee23 [2020-07-07 10:56:23,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:23,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:23,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:23,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:23,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:23,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d65a8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23, skipping insertion in model container [2020-07-07 10:56:23,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:23,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:23,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:23,428 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:23,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:23,466 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:23,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23 WrapperNode [2020-07-07 10:56:23,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:23,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:23,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:23,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:23,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (1/1) ... [2020-07-07 10:56:23,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:23,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:23,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:23,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:23,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (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 [2020-07-07 10:56:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-07 10:56:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:56:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-07 10:56:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:23,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:23,893 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:56:23,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:23 BoogieIcfgContainer [2020-07-07 10:56:23,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:23,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:23,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:23,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:23,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:23" (1/3) ... [2020-07-07 10:56:23,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abe6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:23, skipping insertion in model container [2020-07-07 10:56:23,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:23" (2/3) ... [2020-07-07 10:56:23,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abe6b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:23, skipping insertion in model container [2020-07-07 10:56:23,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:23" (3/3) ... [2020-07-07 10:56:23,906 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-07 10:56:23,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:23,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:23,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:23,973 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:23,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:23,973 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:23,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:23,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:23,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:23,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:23,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 10:56:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 10:56:24,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:24,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:24,005 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-07 10:56:24,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:24,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338300654] [2020-07-07 10:56:24,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:24,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338300654] [2020-07-07 10:56:24,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:24,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 10:56:24,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886456995] [2020-07-07 10:56:24,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:24,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:24,343 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-07 10:56:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:24,536 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-07-07 10:56:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:56:24,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-07 10:56:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:24,553 INFO L225 Difference]: With dead ends: 41 [2020-07-07 10:56:24,553 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 10:56:24,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 10:56:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 10:56:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 10:56:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-07 10:56:24,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-07-07 10:56:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:24,636 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-07 10:56:24,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-07 10:56:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 10:56:24,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:24,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:24,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:56:24,642 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-07 10:56:24,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124858571] [2020-07-07 10:56:24,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:24,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124858571] [2020-07-07 10:56:24,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:24,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 10:56:24,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140928934] [2020-07-07 10:56:24,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:24,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:24,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:24,815 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-07-07 10:56:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:25,050 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-07-07 10:56:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:25,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-07 10:56:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:25,053 INFO L225 Difference]: With dead ends: 32 [2020-07-07 10:56:25,053 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 10:56:25,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 10:56:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-07 10:56:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 10:56:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-07-07 10:56:25,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-07-07 10:56:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:25,066 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-07-07 10:56:25,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-07-07 10:56:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 10:56:25,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:25,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 10:56:25,070 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,070 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-07-07 10:56:25,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279827901] [2020-07-07 10:56:25,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 10:56:25,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279827901] [2020-07-07 10:56:25,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227091160] [2020-07-07 10:56:25,246 INFO L94 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 [2020-07-07 10:56:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 10:56:25,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-07 10:56:25,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:25,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-07-07 10:56:25,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881173727] [2020-07-07 10:56:25,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:25,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:25,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:25,424 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2020-07-07 10:56:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:25,594 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2020-07-07 10:56:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:25,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-07 10:56:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:25,598 INFO L225 Difference]: With dead ends: 51 [2020-07-07 10:56:25,598 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 10:56:25,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 10:56:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-07-07 10:56:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 10:56:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-07 10:56:25,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-07-07 10:56:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:25,611 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-07 10:56:25,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-07 10:56:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 10:56:25,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-07 10:56:25,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 10:56:25,827 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-07 10:56:25,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492548513] [2020-07-07 10:56:25,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-07 10:56:26,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492548513] [2020-07-07 10:56:26,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727987014] [2020-07-07 10:56:26,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 10:56:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 10:56:26,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2020-07-07 10:56:26,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945614039] [2020-07-07 10:56:26,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:26,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:26,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:26,149 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 14 states. [2020-07-07 10:56:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,666 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2020-07-07 10:56:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 10:56:26,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-07-07 10:56:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,670 INFO L225 Difference]: With dead ends: 54 [2020-07-07 10:56:26,670 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 10:56:26,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-07-07 10:56:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 10:56:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-07-07 10:56:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 10:56:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2020-07-07 10:56:26,692 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2020-07-07 10:56:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,693 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2020-07-07 10:56:26,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2020-07-07 10:56:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 10:56:26,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,698 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:26,900 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2020-07-07 10:56:26,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533901815] [2020-07-07 10:56:26,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-07 10:56:27,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533901815] [2020-07-07 10:56:27,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982602493] [2020-07-07 10:56:27,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:27,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:27,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:27,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 10:56:27,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 10:56:27,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:27,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2020-07-07 10:56:27,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136482248] [2020-07-07 10:56:27,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 10:56:27,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:27,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 10:56:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-07 10:56:27,199 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 15 states. [2020-07-07 10:56:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:27,718 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2020-07-07 10:56:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:56:27,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-07-07 10:56:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:27,723 INFO L225 Difference]: With dead ends: 65 [2020-07-07 10:56:27,724 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 10:56:27,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:56:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 10:56:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-07-07 10:56:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 10:56:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-07-07 10:56:27,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2020-07-07 10:56:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:27,740 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-07-07 10:56:27,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 10:56:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-07-07 10:56:27,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 10:56:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:27,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:27,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:27,959 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:27,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2020-07-07 10:56:27,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:27,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101145051] [2020-07-07 10:56:27,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 10:56:28,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101145051] [2020-07-07 10:56:28,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473956432] [2020-07-07 10:56:28,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 10:56:28,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:28,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:28,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-07 10:56:28,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:28,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2020-07-07 10:56:28,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055950303] [2020-07-07 10:56:28,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:28,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:28,298 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 14 states. [2020-07-07 10:56:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:28,735 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-07-07 10:56:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 10:56:28,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-07-07 10:56:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:28,738 INFO L225 Difference]: With dead ends: 81 [2020-07-07 10:56:28,738 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 10:56:28,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 10:56:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-07 10:56:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 10:56:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 81 transitions. [2020-07-07 10:56:28,753 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 81 transitions. Word has length 42 [2020-07-07 10:56:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:28,754 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 81 transitions. [2020-07-07 10:56:28,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 81 transitions. [2020-07-07 10:56:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 10:56:28,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:28,757 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:28,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,973 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2003160496, now seen corresponding path program 4 times [2020-07-07 10:56:28,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:28,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379211140] [2020-07-07 10:56:28,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-07 10:56:29,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379211140] [2020-07-07 10:56:29,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973002521] [2020-07-07 10:56:29,098 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:29,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:29,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:29,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-07 10:56:29,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:29,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-07 10:56:29,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524990957] [2020-07-07 10:56:29,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:29,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:29,197 INFO L87 Difference]: Start difference. First operand 53 states and 81 transitions. Second operand 6 states. [2020-07-07 10:56:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:29,255 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-07-07 10:56:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 10:56:29,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-07-07 10:56:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:29,257 INFO L225 Difference]: With dead ends: 101 [2020-07-07 10:56:29,257 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 10:56:29,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 10:56:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-07 10:56:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 10:56:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 87 transitions. [2020-07-07 10:56:29,291 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 87 transitions. Word has length 62 [2020-07-07 10:56:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:29,292 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 87 transitions. [2020-07-07 10:56:29,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 87 transitions. [2020-07-07 10:56:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-07 10:56:29,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:29,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:29,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 10:56:29,515 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:29,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1483482771, now seen corresponding path program 5 times [2020-07-07 10:56:29,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:29,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415065760] [2020-07-07 10:56:29,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-07 10:56:29,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415065760] [2020-07-07 10:56:29,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169228034] [2020-07-07 10:56:29,874 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:29,920 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 10:56:29,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:29,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-07-07 10:56:29,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:29,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 19 [2020-07-07 10:56:29,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987980982] [2020-07-07 10:56:29,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 10:56:29,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 10:56:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-07-07 10:56:29,984 INFO L87 Difference]: Start difference. First operand 56 states and 87 transitions. Second operand 19 states. [2020-07-07 10:56:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:30,672 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2020-07-07 10:56:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:30,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2020-07-07 10:56:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:30,673 INFO L225 Difference]: With dead ends: 101 [2020-07-07 10:56:30,673 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 10:56:30,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 10:56:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 10:56:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 10:56:30,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 10:56:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 10:56:30,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2020-07-07 10:56:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:30,677 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 10:56:30,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 10:56:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 10:56:30,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 10:56:30,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:30,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 10:56:31,321 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-07-07 10:56:31,365 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 10:56:31,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:31,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:31,385 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 10:56:31,385 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 10:56:31,386 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 10:56:31,386 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-07-07 10:56:31,386 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|)) [2020-07-07 10:56:31,386 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-07-07 10:56:31,386 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-07 10:56:31,386 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= 0 |ackermann_#in~m|)) (= 0 |ackermann_#in~n|)) [2020-07-07 10:56:31,386 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret1|))) (and (or (= 1 |ackermann_#in~n|) .cse0 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))) (let ((.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse1 .cse2 (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse3))))) [2020-07-07 10:56:31,386 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-07-07 10:56:31,386 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-07-07 10:56:31,387 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-07-07 10:56:31,388 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-07-07 10:56:31,388 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-07-07 10:56:31,388 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-07-07 10:56:31,388 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-07 10:56:31,388 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-07-07 10:56:31,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 10:56:31 BoogieIcfgContainer [2020-07-07 10:56:31,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 10:56:31,394 INFO L168 Benchmark]: Toolchain (without parser) took 8183.05 ms. Allocated memory was 137.4 MB in the beginning and 296.2 MB in the end (delta: 158.9 MB). Free memory was 100.9 MB in the beginning and 267.9 MB in the end (delta: -167.0 MB). Peak memory consumption was 144.8 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,395 INFO L168 Benchmark]: CDTParser took 2.67 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,396 INFO L168 Benchmark]: Boogie Preprocessor took 34.31 ms. Allocated memory is still 137.4 MB. Free memory was 91.0 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,399 INFO L168 Benchmark]: RCFGBuilder took 395.08 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 89.7 MB in the beginning and 170.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,400 INFO L168 Benchmark]: TraceAbstraction took 7494.05 ms. Allocated memory was 203.9 MB in the beginning and 296.2 MB in the end (delta: 92.3 MB). Free memory was 170.3 MB in the beginning and 267.9 MB in the end (delta: -97.6 MB). Peak memory consumption was 147.6 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:31,410 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.67 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.31 ms. Allocated memory is still 137.4 MB. Free memory was 91.0 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.08 ms. Allocated memory was 137.4 MB in the beginning and 203.9 MB in the end (delta: 66.6 MB). Free memory was 89.7 MB in the beginning and 170.3 MB in the end (delta: -80.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7494.05 ms. Allocated memory was 203.9 MB in the beginning and 296.2 MB in the end (delta: 92.3 MB). Free memory was 170.3 MB in the beginning and 267.9 MB in the end (delta: -97.6 MB). Peak memory consumption was 147.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 8, TraceHistogramMax: 10, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 193 SDslu, 849 SDs, 0 SdLazy, 1587 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 517 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 152 NumberOfFragments, 80 HoareAnnotationTreeSize, 125 FomulaSimplifications, 8790 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 217 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 605 NumberOfCodeBlocks, 557 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 52611 SizeOfPredicates, 19 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 789/948 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...