/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_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:11:42,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:11:42,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:11:42,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:11:42,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:11:42,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:11:42,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:11:42,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:11:42,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:11:42,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:11:42,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:11:42,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:11:42,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:11:42,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:11:42,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:11:42,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:11:42,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:11:42,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:11:42,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:11:42,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:11:42,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:11:42,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:11:42,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:11:42,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:11:42,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:11:42,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:11:42,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:11:42,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:11:42,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:11:42,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:11:42,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:11:42,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:11:42,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:11:42,746 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:11:42,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:11:42,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:11:42,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:11:42,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:11:42,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:11:42,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:11:42,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:11:42,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:11:42,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:11:42,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:11:42,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:11:42,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:11:42,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:11:42,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:11:42,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:11:42,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:11:42,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:11:42,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:11:42,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:11:42,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:11:42,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:11:42,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:11:42,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:11:42,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:11:42,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:11:43,037 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:11:43,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:11:43,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:11:43,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:11:43,055 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:11:43,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-07 11:11:43,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d1823a/6b82c96bc0d447d999ddd351be3c87af/FLAG72764b273 [2020-07-07 11:11:43,624 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:11:43,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-07 11:11:43,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d1823a/6b82c96bc0d447d999ddd351be3c87af/FLAG72764b273 [2020-07-07 11:11:44,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d1823a/6b82c96bc0d447d999ddd351be3c87af [2020-07-07 11:11:44,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:11:44,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:11:44,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:44,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:11:44,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:11:44,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560e2400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:11:44,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:11:44,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:44,272 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:11:44,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:44,300 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:11:44,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44 WrapperNode [2020-07-07 11:11:44,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:44,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:11:44,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:11:44,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:11:44,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... [2020-07-07 11:11:44,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:11:44,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:11:44,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:11:44,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:11:44,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:11:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:11:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:11:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-07 11:11:44,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:11:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:11:44,652 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:11:44,653 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:11:44,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:44 BoogieIcfgContainer [2020-07-07 11:11:44,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:11:44,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:11:44,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:11:44,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:11:44,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:11:44" (1/3) ... [2020-07-07 11:11:44,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46be5b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:44" (2/3) ... [2020-07-07 11:11:44,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46be5b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:44, skipping insertion in model container [2020-07-07 11:11:44,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:44" (3/3) ... [2020-07-07 11:11:44,668 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-07-07 11:11:44,680 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:11:44,688 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:11:44,709 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:11:44,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:11:44,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:11:44,742 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:11:44,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:11:44,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:11:44,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:11:44,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:11:44,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:11:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 11:11:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:11:44,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:44,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:44,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-07 11:11:44,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:44,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073075002] [2020-07-07 11:11:44,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:11:45,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073075002] [2020-07-07 11:11:45,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:45,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:45,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90143480] [2020-07-07 11:11:45,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:45,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:45,055 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-07 11:11:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,168 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-07 11:11:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:45,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:11:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,189 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:11:45,189 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:11:45,194 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 [2020-07-07 11:11:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:11:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:11:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:11:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-07 11:11:45,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-07 11:11:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,241 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-07 11:11:45,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-07 11:11:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:11:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:45,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:11:45,245 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-07 11:11:45,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:45,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503540364] [2020-07-07 11:11:45,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:11:45,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503540364] [2020-07-07 11:11:45,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:45,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:45,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843346866] [2020-07-07 11:11:45,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:45,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:45,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:45,316 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-07 11:11:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,373 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-07 11:11:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:45,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 11:11:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,375 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:11:45,375 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:11:45,377 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 [2020-07-07 11:11:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:11:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-07 11:11:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:11:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-07 11:11:45,385 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-07 11:11:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,386 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-07 11:11:45,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-07 11:11:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:11:45,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:45,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:11:45,388 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-07 11:11:45,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:45,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707303266] [2020-07-07 11:11:45,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:11:45,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707303266] [2020-07-07 11:11:45,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253114430] [2020-07-07 11:11:45,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:45,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:11:45,585 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:11:45,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:45,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-07 11:11:45,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854397538] [2020-07-07 11:11:45,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:11:45,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:11:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:11:45,663 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-07 11:11:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:45,800 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-07 11:11:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:11:45,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-07 11:11:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:45,802 INFO L225 Difference]: With dead ends: 38 [2020-07-07 11:11:45,802 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:11:45,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:11:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:11:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:11:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:11:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-07 11:11:45,813 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-07 11:11:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:45,813 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-07 11:11:45,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:11:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-07 11:11:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:11:45,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:45,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:46,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:11:46,032 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-07 11:11:46,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:46,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787180267] [2020-07-07 11:11:46,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:11:46,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787180267] [2020-07-07 11:11:46,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203441438] [2020-07-07 11:11:46,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:11:46,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:11:46,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:46,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-07 11:11:46,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760021247] [2020-07-07 11:11:46,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:11:46,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:11:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:11:46,265 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-07-07 11:11:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:46,383 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-07 11:11:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:11:46,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-07 11:11:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:46,388 INFO L225 Difference]: With dead ends: 41 [2020-07-07 11:11:46,389 INFO L226 Difference]: Without dead ends: 37 [2020-07-07 11:11:46,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:11:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-07 11:11:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-07 11:11:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 11:11:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-07 11:11:46,411 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-07 11:11:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:46,412 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-07 11:11:46,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:11:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-07 11:11:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:11:46,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:46,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:46,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:46,633 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-07-07 11:11:46,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:46,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178717882] [2020-07-07 11:11:46,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:11:46,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178717882] [2020-07-07 11:11:46,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111408660] [2020-07-07 11:11:46,812 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:46,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:11:46,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:46,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:46,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 11:11:46,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:46,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2020-07-07 11:11:46,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095150136] [2020-07-07 11:11:46,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:11:46,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:11:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:11:46,930 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 13 states. [2020-07-07 11:11:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:47,158 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-07-07 11:11:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:11:47,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-07-07 11:11:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:47,161 INFO L225 Difference]: With dead ends: 72 [2020-07-07 11:11:47,161 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:11:47,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:11:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:11:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-07 11:11:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:11:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-07 11:11:47,172 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-07-07 11:11:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:47,172 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-07 11:11:47,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:11:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-07 11:11:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 11:11:47,175 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:47,175 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:47,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:47,390 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 3 times [2020-07-07 11:11:47,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:47,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162861085] [2020-07-07 11:11:47,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 80 proven. 101 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-07-07 11:11:47,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162861085] [2020-07-07 11:11:47,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088439191] [2020-07-07 11:11:47,766 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:47,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-07-07 11:11:47,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:47,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:47,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-07 11:11:47,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:47,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 17 [2020-07-07 11:11:47,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398981240] [2020-07-07 11:11:47,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:11:47,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:47,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:11:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:11:47,868 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 17 states. [2020-07-07 11:11:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:48,246 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2020-07-07 11:11:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:11:48,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-07-07 11:11:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:48,252 INFO L225 Difference]: With dead ends: 89 [2020-07-07 11:11:48,253 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:11:48,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:11:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:11:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-07-07 11:11:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:11:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-07-07 11:11:48,279 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-07-07 11:11:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:48,280 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-07-07 11:11:48,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:11:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-07-07 11:11:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-07 11:11:48,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:48,284 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:48,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:48,485 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2068257585, now seen corresponding path program 4 times [2020-07-07 11:11:48,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:48,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162891260] [2020-07-07 11:11:48,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 231 proven. 362 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2020-07-07 11:11:49,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162891260] [2020-07-07 11:11:49,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147000816] [2020-07-07 11:11:49,038 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:49,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:11:49,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:49,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:11:49,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-07 11:11:49,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:49,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 22 [2020-07-07 11:11:49,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109400875] [2020-07-07 11:11:49,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:11:49,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:11:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:11:49,236 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 22 states. [2020-07-07 11:11:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:49,728 INFO L93 Difference]: Finished difference Result 124 states and 219 transitions. [2020-07-07 11:11:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:11:49,729 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2020-07-07 11:11:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:49,731 INFO L225 Difference]: With dead ends: 124 [2020-07-07 11:11:49,731 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 11:11:49,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:11:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 11:11:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-07-07 11:11:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:11:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-07-07 11:11:49,744 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 150 [2020-07-07 11:11:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:49,744 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-07-07 11:11:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:11:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-07-07 11:11:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:11:49,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:49,747 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:49,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:11:49,961 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-07 11:11:49,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:49,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768623298] [2020-07-07 11:11:49,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-07 11:11:50,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768623298] [2020-07-07 11:11:50,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845030838] [2020-07-07 11:11:50,416 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:50,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-07-07 11:11:50,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:50,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-07 11:11:50,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-07-07 11:11:50,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:50,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-07-07 11:11:50,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755524160] [2020-07-07 11:11:50,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:11:50,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:11:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:11:50,790 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 20 states. [2020-07-07 11:11:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:50,978 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-07-07 11:11:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:11:50,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-07-07 11:11:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:50,981 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:11:50,981 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 11:11:50,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:11:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 11:11:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-07 11:11:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-07 11:11:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-07-07 11:11:50,992 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 109 [2020-07-07 11:11:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:50,993 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-07-07 11:11:50,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:11:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-07-07 11:11:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-07 11:11:50,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:50,995 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:51,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:51,209 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:51,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 6 times [2020-07-07 11:11:51,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:51,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334863345] [2020-07-07 11:11:51,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 214 proven. 209 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-07-07 11:11:51,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334863345] [2020-07-07 11:11:51,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611165427] [2020-07-07 11:11:51,576 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:11:51,645 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-07-07 11:11:51,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:51,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:11:51,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-07-07 11:11:51,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:51,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-07-07 11:11:51,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10405424] [2020-07-07 11:11:51,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:11:51,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:11:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:11:51,764 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 18 states. [2020-07-07 11:11:52,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:52,050 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2020-07-07 11:11:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:11:52,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-07-07 11:11:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:52,053 INFO L225 Difference]: With dead ends: 131 [2020-07-07 11:11:52,053 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:11:52,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:11:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:11:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:11:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:11:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:11:52,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-07-07 11:11:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:52,057 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:11:52,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:11:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:11:52,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:11:52,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:52,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:11:52,698 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-07 11:11:52,775 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:11:52,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:52,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:52,776 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:11:52,776 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:11:52,776 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:11:52,776 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-07 11:11:52,777 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-07 11:11:52,777 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-07 11:11:52,777 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-07 11:11:52,777 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-07-07 11:11:52,777 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-07 11:11:52,779 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n)) [2020-07-07 11:11:52,779 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-07 11:11:52,781 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (= fibo_~n |fibo_#in~n|)) (.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1))) (or (and .cse0 (<= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= 4 fibo_~n)) (and (<= 3 |fibo_#t~ret0|) .cse0 (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3)) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (< 1 fibo_~n) (<= fibo_~n 2)) (and .cse1 .cse2 (<= fibo_~n 3) (<= 3 fibo_~n) (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-07-07 11:11:52,781 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-07 11:11:52,782 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-07 11:11:52,782 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-07 11:11:52,782 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-07 11:11:52,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:11:52 BoogieIcfgContainer [2020-07-07 11:11:52,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:11:52,795 INFO L168 Benchmark]: Toolchain (without parser) took 8727.31 ms. Allocated memory was 136.8 MB in the beginning and 333.4 MB in the end (delta: 196.6 MB). Free memory was 101.1 MB in the beginning and 269.7 MB in the end (delta: -168.6 MB). Peak memory consumption was 208.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:52,802 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:11:52,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.60 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:52,807 INFO L168 Benchmark]: Boogie Preprocessor took 23.12 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:52,809 INFO L168 Benchmark]: RCFGBuilder took 333.22 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 168.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:52,810 INFO L168 Benchmark]: TraceAbstraction took 8133.26 ms. Allocated memory was 200.8 MB in the beginning and 333.4 MB in the end (delta: 132.6 MB). Free memory was 167.4 MB in the beginning and 269.7 MB in the end (delta: -102.3 MB). Peak memory consumption was 210.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:52,818 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.60 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.12 ms. Allocated memory is still 136.8 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.22 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 168.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8133.26 ms. Allocated memory was 200.8 MB in the beginning and 333.4 MB in the end (delta: 132.6 MB). Free memory was 167.4 MB in the beginning and 269.7 MB in the end (delta: -102.3 MB). Peak memory consumption was 210.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 9, TraceHistogramMax: 21, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 312 SDslu, 1028 SDs, 0 SdLazy, 1282 SolverSat, 309 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 895 GetRequests, 749 SyntacticMatches, 9 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 128 PreInvPairs, 197 NumberOfFragments, 91 HoareAnnotationTreeSize, 128 FomulaSimplifications, 477 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1128 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1167 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1151 ConstructedInterpolants, 0 QuantifiedInterpolants, 282459 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1186 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 4448/6054 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...