/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:44,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:44,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:44,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:44,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:44,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:44,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:44,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:44,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:44,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:44,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:44,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:44,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:44,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:44,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:44,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:44,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:44,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:44,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:44,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:44,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:44,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:44,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:44,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:44,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:12:44,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:44,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:44,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:44,174 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 11:12:44,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:44,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:44,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:44,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:44,192 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:44,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:44,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:44,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:44,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:44,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:44,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:44,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:44,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:44,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:44,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:44,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:44,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:44,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:44,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:44,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:44,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:44,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:44,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:44,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:44,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:44,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:44,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:44,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:44,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:44,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:44,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:44,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:44,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:44,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:44,567 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:44,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-07-07 11:12:44,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c36ed29/5112c18013e84060b227e7f36e1c39a1/FLAG69501c544 [2020-07-07 11:12:45,201 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:45,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-07-07 11:12:45,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c36ed29/5112c18013e84060b227e7f36e1c39a1/FLAG69501c544 [2020-07-07 11:12:45,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c36ed29/5112c18013e84060b227e7f36e1c39a1 [2020-07-07 11:12:45,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:45,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:45,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:45,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:45,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:45,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ba14b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45, skipping insertion in model container [2020-07-07 11:12:45,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:45,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:45,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:45,863 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:45,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:45,897 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:45,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45 WrapperNode [2020-07-07 11:12:45,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:45,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:45,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:45,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:45,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (1/1) ... [2020-07-07 11:12:45,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:45,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:45,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:45,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:45,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (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 11:12:46,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:46,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:46,280 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:46,281 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:46,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:46 BoogieIcfgContainer [2020-07-07 11:12:46,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:46,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:46,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:46,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:45" (1/3) ... [2020-07-07 11:12:46,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76455e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:46, skipping insertion in model container [2020-07-07 11:12:46,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:45" (2/3) ... [2020-07-07 11:12:46,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76455e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:46, skipping insertion in model container [2020-07-07 11:12:46,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:46" (3/3) ... [2020-07-07 11:12:46,295 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-07-07 11:12:46,306 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:46,314 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:46,330 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:46,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:46,356 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:46,356 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:46,356 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:46,356 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:46,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:46,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:46,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:12:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:46,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:46,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:46,384 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-07 11:12:46,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:46,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982550188] [2020-07-07 11:12:46,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:46,693 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 11:12:46,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982550188] [2020-07-07 11:12:46,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:46,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:46,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290665321] [2020-07-07 11:12:46,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:46,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:46,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:46,734 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:12:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:46,796 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-07 11:12:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:46,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:46,810 INFO L225 Difference]: With dead ends: 32 [2020-07-07 11:12:46,810 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:12:46,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:12:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:12:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:12:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:12:46,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:12:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:46,892 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:12:46,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:12:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:12:46,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:46,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:46,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:46,897 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-07 11:12:46,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:46,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901464884] [2020-07-07 11:12:46,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:47,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901464884] [2020-07-07 11:12:47,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647452083] [2020-07-07 11:12:47,195 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 11:12:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:12:47,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:47,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:47,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-07 11:12:47,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293765132] [2020-07-07 11:12:47,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:12:47,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:12:47,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:12:47,356 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-07 11:12:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:47,393 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:12:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:12:47,393 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-07 11:12:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:47,395 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:12:47,395 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:12:47,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:12:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:12:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:12:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:12:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:12:47,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:12:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:47,404 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:12:47,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:12:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:12:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:12:47,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:47,406 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:47,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:12:47,617 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-07 11:12:47,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:47,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816660797] [2020-07-07 11:12:47,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:47,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816660797] [2020-07-07 11:12:47,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971186024] [2020-07-07 11:12:47,910 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 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 11:12:47,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:47,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:47,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:12:47,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:48,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:48,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-07 11:12:48,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512865789] [2020-07-07 11:12:48,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:48,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:48,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:48,014 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-07-07 11:12:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:48,056 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:12:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:12:48,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-07-07 11:12:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:48,059 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:12:48,059 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:12:48,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:12:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:12:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:12:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:12:48,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:12:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:48,067 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:12:48,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:12:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:12:48,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:48,069 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:48,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-07 11:12:48,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:48,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960453075] [2020-07-07 11:12:48,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:48,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960453075] [2020-07-07 11:12:48,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404044975] [2020-07-07 11:12:48,652 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 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 11:12:48,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:12:48,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:48,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:12:48,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:48,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:48,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-07 11:12:48,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483507322] [2020-07-07 11:12:48,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:12:48,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:12:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:48,791 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-07-07 11:12:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:48,869 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:12:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:12:48,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-07-07 11:12:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:48,871 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:48,872 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:48,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:12:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:12:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:12:48,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:12:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:48,888 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:12:48,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:12:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:12:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:12:48,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:48,890 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:49,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:49,104 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-07 11:12:49,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:49,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329303741] [2020-07-07 11:12:49,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:49,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329303741] [2020-07-07 11:12:49,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332119649] [2020-07-07 11:12:49,480 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 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 11:12:49,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:49,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:49,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-07 11:12:49,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:49,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:49,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-07 11:12:49,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053709027] [2020-07-07 11:12:49,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:12:49,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:12:49,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:49,630 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-07-07 11:12:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:49,732 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:12:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:12:49,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-07 11:12:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:49,735 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:12:49,735 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:12:49,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:12:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:12:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:12:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:12:49,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:12:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:49,745 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:12:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:12:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:12:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:12:49,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:49,747 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:49,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:49,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-07 11:12:49,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:49,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268183234] [2020-07-07 11:12:49,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:50,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268183234] [2020-07-07 11:12:50,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514574981] [2020-07-07 11:12:50,285 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 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 11:12:50,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:12:50,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:50,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-07 11:12:50,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:50,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:50,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-07 11:12:50,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102062333] [2020-07-07 11:12:50,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:12:50,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:50,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:12:50,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:50,479 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-07-07 11:12:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:50,572 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:12:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:12:50,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-07-07 11:12:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:50,574 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:12:50,575 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:12:50,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:12:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:12:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:12:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:12:50,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:12:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:50,583 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:12:50,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:12:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:12:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:12:50,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:50,585 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:50,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:12:50,786 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-07 11:12:50,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:50,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208842469] [2020-07-07 11:12:50,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:51,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208842469] [2020-07-07 11:12:51,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557683689] [2020-07-07 11:12:51,197 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 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 11:12:51,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:12:51,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:51,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-07 11:12:51,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:51,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:51,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-07 11:12:51,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961195978] [2020-07-07 11:12:51,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:12:51,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:51,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:12:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:51,344 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2020-07-07 11:12:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:51,478 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:12:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:12:51,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-07-07 11:12:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:51,481 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:12:51,481 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:12:51,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:12:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:12:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:12:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:12:51,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:12:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:51,495 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:12:51,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:12:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:12:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:12:51,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:51,499 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:51,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:51,701 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-07 11:12:51,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:51,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595053774] [2020-07-07 11:12:51,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:52,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595053774] [2020-07-07 11:12:52,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349088313] [2020-07-07 11:12:52,210 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 11:12:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-07 11:12:52,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:52,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:52,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-07 11:12:52,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145306502] [2020-07-07 11:12:52,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:12:52,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:12:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:52,361 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-07-07 11:12:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:52,558 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:12:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:12:52,559 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-07-07 11:12:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:52,561 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:12:52,561 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:12:52,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:12:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:12:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:12:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:12:52,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:12:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:52,585 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:12:52,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:12:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:12:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:12:52,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:52,590 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:52,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:52,794 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:52,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-07 11:12:52,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:52,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258897883] [2020-07-07 11:12:52,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:53,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258897883] [2020-07-07 11:12:53,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911470166] [2020-07-07 11:12:53,414 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 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 [2020-07-07 11:12:53,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:53,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:53,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-07 11:12:53,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:53,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:53,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-07 11:12:53,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841154015] [2020-07-07 11:12:53,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:12:53,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:12:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:53,601 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-07-07 11:12:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:53,808 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:12:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:12:53,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-07-07 11:12:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:53,811 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:12:53,811 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:12:53,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:12:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:12:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:12:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:12:53,828 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:12:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:53,829 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:12:53,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:12:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:12:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:12:53,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:53,833 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:54,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:12:54,049 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-07 11:12:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:54,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479184426] [2020-07-07 11:12:54,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:54,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479184426] [2020-07-07 11:12:54,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639773553] [2020-07-07 11:12:54,785 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 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 [2020-07-07 11:12:54,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:12:54,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:54,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-07 11:12:54,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:55,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-07 11:12:55,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94985725] [2020-07-07 11:12:55,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:12:55,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:12:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:55,009 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-07-07 11:12:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:55,254 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:12:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:12:55,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-07-07 11:12:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:55,256 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:12:55,256 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:12:55,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:12:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:12:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:12:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:12:55,273 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:12:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:55,273 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:12:55,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:12:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:12:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:12:55,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:55,276 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:55,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:55,477 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-07 11:12:55,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:55,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108553873] [2020-07-07 11:12:55,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:55,552 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:12:55,552 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:12:55,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:12:55,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:55 BoogieIcfgContainer [2020-07-07 11:12:55,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:55,623 INFO L168 Benchmark]: Toolchain (without parser) took 9989.71 ms. Allocated memory was 145.2 MB in the beginning and 314.0 MB in the end (delta: 168.8 MB). Free memory was 103.0 MB in the beginning and 211.2 MB in the end (delta: -108.2 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,624 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.17 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,625 INFO L168 Benchmark]: Boogie Preprocessor took 33.16 ms. Allocated memory is still 145.2 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,637 INFO L168 Benchmark]: RCFGBuilder took 352.48 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 169.3 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,638 INFO L168 Benchmark]: TraceAbstraction took 9332.83 ms. Allocated memory was 200.8 MB in the beginning and 314.0 MB in the end (delta: 113.2 MB). Free memory was 169.3 MB in the beginning and 211.2 MB in the end (delta: -41.8 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:55,646 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.17 ms. Allocated memory is still 145.2 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.16 ms. Allocated memory is still 145.2 MB. Free memory was 93.5 MB in the beginning and 92.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.48 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 169.3 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9332.83 ms. Allocated memory was 200.8 MB in the beginning and 314.0 MB in the end (delta: 113.2 MB). Free memory was 169.3 MB in the beginning and 211.2 MB in the end (delta: -41.8 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=10, input=10] [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.2s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2852 SDs, 0 SdLazy, 1206 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 648 GetRequests, 510 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 860 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 137208 SizeOfPredicates, 9 NumberOfNonLiveVariables, 810 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 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 incorrect! Received shutdown request...