/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/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:58:20,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:58:20,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:58:20,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:58:20,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:58:20,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:58:20,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:58:20,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:58:20,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:58:20,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:58:20,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:58:20,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:58:20,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:58:20,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:58:20,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:58:20,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:58:20,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:58:20,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:58:20,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:58:20,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:58:20,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:58:20,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:58:20,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:58:20,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:58:20,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:58:20,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:58:20,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:58:20,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:58:20,180 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 [2020-07-17 11:58:20,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:58:20,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:58:20,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:58:20,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:58:20,201 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:58:20,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:58:20,201 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:58:20,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:58:20,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:58:20,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:58:20,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:58:20,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:58:20,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:58:20,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:58:20,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:58:20,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:58:20,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:58:20,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:58:20,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:58:20,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:58:20,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:58:20,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:58:20,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:58:20,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:58:20,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:58:20,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:58:20,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:58:20,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:58:20,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:58:20,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:58:20,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:58:20,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:58:20,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:58:20,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:58:20,522 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:58:20,523 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-17 11:58:20,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677ed1c74/70cef104deb443979753f5ccc8eee795/FLAG2068c2ae9 [2020-07-17 11:58:21,067 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:58:21,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-17 11:58:21,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677ed1c74/70cef104deb443979753f5ccc8eee795/FLAG2068c2ae9 [2020-07-17 11:58:21,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/677ed1c74/70cef104deb443979753f5ccc8eee795 [2020-07-17 11:58:21,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:58:21,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:58:21,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:58:21,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:58:21,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:58:21,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527465e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21, skipping insertion in model container [2020-07-17 11:58:21,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:58:21,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:58:21,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:58:21,735 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:58:21,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:58:21,768 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:58:21,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21 WrapperNode [2020-07-17 11:58:21,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:58:21,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:58:21,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:58:21,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:58:21,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (1/1) ... [2020-07-17 11:58:21,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:58:21,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:58:21,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:58:21,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:58:21,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (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 [2020-07-17 11:58:21,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:58:21,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:58:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-17 11:58:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-17 11:58:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:58:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:58:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:58:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-17 11:58:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-17 11:58:21,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:58:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:58:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:58:22,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:58:22,165 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:58:22,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:58:22 BoogieIcfgContainer [2020-07-17 11:58:22,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:58:22,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:58:22,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:58:22,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:58:22,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:58:21" (1/3) ... [2020-07-17 11:58:22,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12db6756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:58:22, skipping insertion in model container [2020-07-17 11:58:22,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:58:21" (2/3) ... [2020-07-17 11:58:22,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12db6756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:58:22, skipping insertion in model container [2020-07-17 11:58:22,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:58:22" (3/3) ... [2020-07-17 11:58:22,180 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-17 11:58:22,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:58:22,200 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:58:22,217 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:58:22,249 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:58:22,250 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:58:22,250 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:58:22,250 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:58:22,250 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:58:22,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:58:22,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:58:22,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:58:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-17 11:58:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:58:22,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:22,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:22,288 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-17 11:58:22,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:22,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999460064] [2020-07-17 11:58:22,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:58:22,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999460064] [2020-07-17 11:58:22,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:58:22,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:58:22,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899025877] [2020-07-17 11:58:22,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:58:22,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:58:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:58:22,551 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-17 11:58:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:22,662 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-17 11:58:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:58:22,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:58:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:22,676 INFO L225 Difference]: With dead ends: 44 [2020-07-17 11:58:22,676 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:58:22,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:58:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:58:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 11:58:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:58:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-17 11:58:22,731 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-17 11:58:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:22,732 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-17 11:58:22,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:58:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-17 11:58:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 11:58:22,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:22,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:22,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:58:22,735 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-17 11:58:22,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:22,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204406128] [2020-07-17 11:58:22,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:58:22,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204406128] [2020-07-17 11:58:22,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:58:22,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:58:22,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690386105] [2020-07-17 11:58:22,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:58:22,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:58:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:58:22,807 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-17 11:58:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:22,883 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-17 11:58:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:58:22,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-17 11:58:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:22,886 INFO L225 Difference]: With dead ends: 36 [2020-07-17 11:58:22,886 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 11:58:22,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:58:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 11:58:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-17 11:58:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:58:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-17 11:58:22,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-17 11:58:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:22,899 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-17 11:58:22,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:58:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-17 11:58:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 11:58:22,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:22,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:22,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:58:22,902 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-17 11:58:22,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:22,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923985164] [2020-07-17 11:58:22,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:58:23,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923985164] [2020-07-17 11:58:23,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763477665] [2020-07-17 11:58:23,078 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 [2020-07-17 11:58:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:58:23,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:58:23,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:23,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-17 11:58:23,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91125295] [2020-07-17 11:58:23,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:58:23,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:58:23,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:58:23,227 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-17 11:58:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:23,490 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-17 11:58:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 11:58:23,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-17 11:58:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:23,493 INFO L225 Difference]: With dead ends: 58 [2020-07-17 11:58:23,493 INFO L226 Difference]: Without dead ends: 34 [2020-07-17 11:58:23,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:58:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-17 11:58:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-17 11:58:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 11:58:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-17 11:58:23,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-17 11:58:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:23,510 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-17 11:58:23,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:58:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-17 11:58:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:58:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:23,513 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, 1, 1, 1, 1, 1] [2020-07-17 11:58:23,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 11:58:23,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-17 11:58:23,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:23,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133779697] [2020-07-17 11:58:23,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:58:23,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133779697] [2020-07-17 11:58:23,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605378239] [2020-07-17 11:58:23,831 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 [2020-07-17 11:58:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:23,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:58:23,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:58:23,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:23,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 11:58:23,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786870104] [2020-07-17 11:58:23,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:58:23,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:58:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:58:23,924 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-07-17 11:58:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:24,158 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-17 11:58:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:58:24,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-17 11:58:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:24,167 INFO L225 Difference]: With dead ends: 54 [2020-07-17 11:58:24,168 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 11:58:24,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:58:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 11:58:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-17 11:58:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 11:58:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-17 11:58:24,201 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-17 11:58:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:24,202 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-17 11:58:24,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:58:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-17 11:58:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 11:58:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:24,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:24,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:24,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-17 11:58:24,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:24,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80866170] [2020-07-17 11:58:24,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 11:58:24,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80866170] [2020-07-17 11:58:24,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105101582] [2020-07-17 11:58:24,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 11:58:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:24,547 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:58:24,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-17 11:58:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-17 11:58:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079121613] [2020-07-17 11:58:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 11:58:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 11:58:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:58:24,630 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-17 11:58:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:24,915 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-17 11:58:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 11:58:24,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-17 11:58:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:24,919 INFO L225 Difference]: With dead ends: 108 [2020-07-17 11:58:24,919 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 11:58:24,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:58:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 11:58:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-17 11:58:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 11:58:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-17 11:58:24,952 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-17 11:58:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:24,952 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-17 11:58:24,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 11:58:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-17 11:58:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 11:58:24,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:24,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:25,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:25,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-17 11:58:25,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:25,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386624066] [2020-07-17 11:58:25,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 11:58:25,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386624066] [2020-07-17 11:58:25,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058446137] [2020-07-17 11:58:25,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 11:58:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:25,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:58:25,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 11:58:25,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:25,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-17 11:58:25,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732557020] [2020-07-17 11:58:25,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 11:58:25,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 11:58:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:58:25,432 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-07-17 11:58:25,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:25,840 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-17 11:58:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:58:25,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-17 11:58:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:25,846 INFO L225 Difference]: With dead ends: 180 [2020-07-17 11:58:25,847 INFO L226 Difference]: Without dead ends: 120 [2020-07-17 11:58:25,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-17 11:58:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-17 11:58:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-17 11:58:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-17 11:58:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-17 11:58:25,879 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-17 11:58:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:25,879 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-17 11:58:25,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 11:58:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-17 11:58:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-17 11:58:25,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:25,884 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:26,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:26,095 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:26,095 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-17 11:58:26,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:26,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232477538] [2020-07-17 11:58:26,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-17 11:58:26,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232477538] [2020-07-17 11:58:26,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455567482] [2020-07-17 11:58:26,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 11:58:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:26,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:58:26,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-17 11:58:26,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:26,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-17 11:58:26,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429267283] [2020-07-17 11:58:26,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:58:26,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:58:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:58:26,435 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 12 states. [2020-07-17 11:58:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:26,846 INFO L93 Difference]: Finished difference Result 265 states and 511 transitions. [2020-07-17 11:58:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:58:26,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-07-17 11:58:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:26,850 INFO L225 Difference]: With dead ends: 265 [2020-07-17 11:58:26,851 INFO L226 Difference]: Without dead ends: 165 [2020-07-17 11:58:26,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:58:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-17 11:58:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-07-17 11:58:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-17 11:58:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2020-07-17 11:58:26,883 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2020-07-17 11:58:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:26,883 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2020-07-17 11:58:26,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:58:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2020-07-17 11:58:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-17 11:58:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:26,888 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:27,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 11:58:27,102 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-17 11:58:27,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:27,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389734432] [2020-07-17 11:58:27,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-17 11:58:27,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389734432] [2020-07-17 11:58:27,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227846010] [2020-07-17 11:58:27,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 11:58:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:27,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:58:27,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-17 11:58:27,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:27,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-07-17 11:58:27,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73779829] [2020-07-17 11:58:27,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 11:58:27,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:27,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 11:58:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:58:27,382 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand 13 states. [2020-07-17 11:58:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:27,748 INFO L93 Difference]: Finished difference Result 304 states and 583 transitions. [2020-07-17 11:58:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 11:58:27,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-17 11:58:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:27,754 INFO L225 Difference]: With dead ends: 304 [2020-07-17 11:58:27,754 INFO L226 Difference]: Without dead ends: 101 [2020-07-17 11:58:27,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-07-17 11:58:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-17 11:58:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-07-17 11:58:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-17 11:58:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2020-07-17 11:58:27,794 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 55 [2020-07-17 11:58:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:27,795 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2020-07-17 11:58:27,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 11:58:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2020-07-17 11:58:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 11:58:27,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:27,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:28,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:28,016 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 2 times [2020-07-17 11:58:28,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:28,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921366385] [2020-07-17 11:58:28,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-17 11:58:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921366385] [2020-07-17 11:58:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021926836] [2020-07-17 11:58:28,250 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:28,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:58:28,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:58:28,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:58:28,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-17 11:58:28,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:28,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-07-17 11:58:28,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604180163] [2020-07-17 11:58:28,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 11:58:28,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:28,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 11:58:28,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-07-17 11:58:28,390 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 16 states. [2020-07-17 11:58:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:28,966 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-07-17 11:58:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:58:28,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-07-17 11:58:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:28,969 INFO L225 Difference]: With dead ends: 174 [2020-07-17 11:58:28,969 INFO L226 Difference]: Without dead ends: 89 [2020-07-17 11:58:28,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-07-17 11:58:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-17 11:58:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-07-17 11:58:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-17 11:58:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2020-07-17 11:58:28,982 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2020-07-17 11:58:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:28,983 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2020-07-17 11:58:28,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 11:58:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2020-07-17 11:58:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-17 11:58:28,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:28,986 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:29,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:29,188 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-07-17 11:58:29,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:29,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149959413] [2020-07-17 11:58:29,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-17 11:58:29,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149959413] [2020-07-17 11:58:29,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616263365] [2020-07-17 11:58:29,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:29,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-17 11:58:29,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-17 11:58:29,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:29,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-17 11:58:29,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851189236] [2020-07-17 11:58:29,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 11:58:29,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 11:58:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-17 11:58:29,847 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 21 states. [2020-07-17 11:58:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:29,999 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2020-07-17 11:58:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 11:58:30,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-17 11:58:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:30,002 INFO L225 Difference]: With dead ends: 97 [2020-07-17 11:58:30,002 INFO L226 Difference]: Without dead ends: 93 [2020-07-17 11:58:30,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-17 11:58:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-17 11:58:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-07-17 11:58:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-17 11:58:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2020-07-17 11:58:30,013 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 68 [2020-07-17 11:58:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:30,013 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2020-07-17 11:58:30,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 11:58:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2020-07-17 11:58:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 11:58:30,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:58:30,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:58:30,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-17 11:58:30,229 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:58:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:58:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-17 11:58:30,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:58:30,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100799234] [2020-07-17 11:58:30,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:58:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-17 11:58:30,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100799234] [2020-07-17 11:58:30,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619444441] [2020-07-17 11:58:30,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:58:30,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:58:30,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:58:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-17 11:58:30,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:58:30,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2020-07-17 11:58:30,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432432991] [2020-07-17 11:58:30,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:58:30,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:58:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:58:30,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:58:30,530 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand 12 states. [2020-07-17 11:58:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:58:30,764 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2020-07-17 11:58:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 11:58:30,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-07-17 11:58:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:58:30,765 INFO L225 Difference]: With dead ends: 162 [2020-07-17 11:58:30,766 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:58:30,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:58:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:58:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:58:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:58:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:58:30,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2020-07-17 11:58:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:58:30,771 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:58:30,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:58:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:58:30,771 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:58:30,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:58:30,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:58:31,615 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2020-07-17 11:58:31,619 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:58:31,619 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:58:31,620 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:58:31,620 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:58:31,620 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:58:31,620 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:58:31,620 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-17 11:58:31,621 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-17 11:58:31,621 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-17 11:58:31,621 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-17 11:58:31,621 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-17 11:58:31,621 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-17 11:58:31,621 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-17 11:58:31,622 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-17 11:58:31,622 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-17 11:58:31,622 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-17 11:58:31,622 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 11:58:31,622 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-17 11:58:31,622 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (or (and (<= |fibo2_#in~n| 2) (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|)) (not (<= |fibo2_#in~n| 3))) (= fibo2_~n |fibo2_#in~n|)) [2020-07-17 11:58:31,622 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-17 11:58:31,623 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-17 11:58:31,623 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-17 11:58:31,623 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-17 11:58:31,623 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-17 11:58:31,623 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-17 11:58:31,623 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-17 11:58:31,623 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-17 11:58:31,624 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret0|) (<= 3 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0) (and (<= 4 fibo1_~n) .cse0))) (or (<= 5 |fibo1_#in~n|) (<= |fibo1_#in~n| 3) (and (<= |fibo1_#t~ret0| 2) (<= 2 |fibo1_#t~ret0|)))) [2020-07-17 11:58:31,624 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-17 11:58:31,624 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-17 11:58:31,624 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-17 11:58:31,624 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-17 11:58:31,624 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-17 11:58:31,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:58:31 BoogieIcfgContainer [2020-07-17 11:58:31,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:58:31,631 INFO L168 Benchmark]: Toolchain (without parser) took 10154.44 ms. Allocated memory was 145.8 MB in the beginning and 298.8 MB in the end (delta: 153.1 MB). Free memory was 103.4 MB in the beginning and 201.9 MB in the end (delta: -98.5 MB). Peak memory consumption was 161.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,631 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.46 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 93.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,633 INFO L168 Benchmark]: Boogie Preprocessor took 126.49 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,634 INFO L168 Benchmark]: RCFGBuilder took 273.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 167.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,635 INFO L168 Benchmark]: TraceAbstraction took 9457.69 ms. Allocated memory was 202.4 MB in the beginning and 298.8 MB in the end (delta: 96.5 MB). Free memory was 167.2 MB in the beginning and 201.9 MB in the end (delta: -34.7 MB). Peak memory consumption was 168.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:58:31,638 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 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.46 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 93.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.49 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 167.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9457.69 ms. Allocated memory was 202.4 MB in the beginning and 298.8 MB in the end (delta: 96.5 MB). Free memory was 167.2 MB in the beginning and 201.9 MB in the end (delta: -34.7 MB). Peak memory consumption was 168.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 332 SDtfs, 376 SDslu, 2127 SDs, 0 SdLazy, 2122 SolverSat, 318 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 755 GetRequests, 587 SyntacticMatches, 5 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred 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: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 73 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 404 PreInvPairs, 488 NumberOfFragments, 88 HoareAnnotationTreeSize, 404 FomulaSimplifications, 980 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1070 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 921 NumberOfCodeBlocks, 921 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 901 ConstructedInterpolants, 0 QuantifiedInterpolants, 104145 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1002 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 549/762 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...