/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/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:57:05,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:57:05,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:57:05,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:57:05,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:57:05,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:57:05,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:57:05,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:57:05,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:57:05,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:57:05,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:57:05,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:57:05,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:57:05,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:57:05,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:57:05,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:57:05,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:57:05,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:57:05,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:57:05,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:57:05,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:57:05,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:57:05,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:57:05,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:57:05,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:57:05,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:57:05,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:57:05,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:57:05,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:57:05,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:57:05,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:57:05,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:57:05,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:57:05,303 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:57:05,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:57:05,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:57:05,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:57:05,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:57:05,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:57:05,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:57:05,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:57:05,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:57:05,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:57:05,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:57:05,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:57:05,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:57:05,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:57:05,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:57:05,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:57:05,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:57:05,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:05,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:57:05,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:57:05,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:57:05,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:57:05,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:57:05,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:57:05,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:57:05,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:57:05,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:57:05,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:57:05,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:57:05,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:57:05,635 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:57:05,636 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-08-22 16:57:05,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667c27a5a/117640ecd7a54fb48e3585e1f986e4d5/FLAG3db40c0fe [2020-08-22 16:57:06,178 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:57:06,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-08-22 16:57:06,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667c27a5a/117640ecd7a54fb48e3585e1f986e4d5/FLAG3db40c0fe [2020-08-22 16:57:06,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667c27a5a/117640ecd7a54fb48e3585e1f986e4d5 [2020-08-22 16:57:06,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:06,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:06,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:06,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:06,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:06,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108472ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06, skipping insertion in model container [2020-08-22 16:57:06,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:06,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:06,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:06,760 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:06,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:06,792 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:06,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06 WrapperNode [2020-08-22 16:57:06,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:06,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:06,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:06,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:06,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... [2020-08-22 16:57:06,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:06,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:06,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:06,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:06,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:07,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:07,152 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:57:07,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:07 BoogieIcfgContainer [2020-08-22 16:57:07,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:07,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:07,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:07,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:07,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:06" (1/3) ... [2020-08-22 16:57:07,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454af113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:07, skipping insertion in model container [2020-08-22 16:57:07,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:06" (2/3) ... [2020-08-22 16:57:07,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454af113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:07, skipping insertion in model container [2020-08-22 16:57:07,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:07" (3/3) ... [2020-08-22 16:57:07,165 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-08-22 16:57:07,176 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:07,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:07,199 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:07,226 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:07,226 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:07,226 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:07,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:07,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:07,227 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:07,227 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:07,227 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-22 16:57:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:57:07,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:07,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:07,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-22 16:57:07,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:07,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775839580] [2020-08-22 16:57:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:07,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775839580] [2020-08-22 16:57:07,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:07,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:57:07,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058792603] [2020-08-22 16:57:07,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:57:07,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:07,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:57:07,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:07,443 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-22 16:57:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:07,463 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-22 16:57:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:57:07,465 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 16:57:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:07,472 INFO L225 Difference]: With dead ends: 30 [2020-08-22 16:57:07,472 INFO L226 Difference]: Without dead ends: 13 [2020-08-22 16:57:07,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-22 16:57:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-22 16:57:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-22 16:57:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-22 16:57:07,509 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-22 16:57:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:07,509 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-22 16:57:07,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:57:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-22 16:57:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:57:07,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:07,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:07,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:57:07,511 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-22 16:57:07,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:07,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807574394] [2020-08-22 16:57:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:07,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807574394] [2020-08-22 16:57:07,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:07,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:57:07,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251740133] [2020-08-22 16:57:07,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:07,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:07,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:07,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:07,613 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-22 16:57:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:07,664 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-08-22 16:57:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:07,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 16:57:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:07,666 INFO L225 Difference]: With dead ends: 21 [2020-08-22 16:57:07,666 INFO L226 Difference]: Without dead ends: 16 [2020-08-22 16:57:07,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-22 16:57:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-22 16:57:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-22 16:57:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-22 16:57:07,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-08-22 16:57:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:07,675 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-22 16:57:07,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-22 16:57:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:57:07,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:07,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:07,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:57:07,678 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-22 16:57:07,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:07,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364079131] [2020-08-22 16:57:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364079131] [2020-08-22 16:57:07,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966548614] [2020-08-22 16:57:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:57:07,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:08,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:08,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:08,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-08-22 16:57:08,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683538962] [2020-08-22 16:57:08,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:57:08,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:57:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:57:08,212 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 16 states. [2020-08-22 16:57:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:08,453 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-22 16:57:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:57:08,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-08-22 16:57:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:08,454 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:57:08,455 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:57:08,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:57:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:57:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-08-22 16:57:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 16:57:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 16:57:08,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-08-22 16:57:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:08,462 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 16:57:08,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:57:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 16:57:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:57:08,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:08,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:08,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:57:08,665 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2020-08-22 16:57:08,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:08,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819059461] [2020-08-22 16:57:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:08,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:08,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819059461] [2020-08-22 16:57:08,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084384893] [2020-08-22 16:57:08,746 INFO L95 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 [2020-08-22 16:57:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:57:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:08,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:08,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-08-22 16:57:08,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541179074] [2020-08-22 16:57:08,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:08,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:08,789 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-08-22 16:57:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:08,825 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 16:57:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:08,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-22 16:57:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:08,826 INFO L225 Difference]: With dead ends: 30 [2020-08-22 16:57:08,826 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:57:08,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:57:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-22 16:57:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:57:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:57:08,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:57:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:08,833 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:57:08,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:57:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:57:08,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:08,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:09,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:09,049 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2020-08-22 16:57:09,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:09,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402556426] [2020-08-22 16:57:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:09,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 16:57:09,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402556426] [2020-08-22 16:57:09,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990158125] [2020-08-22 16:57:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:57:09,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:09,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:57:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:09,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:09,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:09,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-08-22 16:57:09,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759010559] [2020-08-22 16:57:09,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:57:09,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:09,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:57:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:57:09,572 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2020-08-22 16:57:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:10,169 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-22 16:57:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 16:57:10,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2020-08-22 16:57:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:10,171 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:57:10,171 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 16:57:10,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:57:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 16:57:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-08-22 16:57:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:57:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-22 16:57:10,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-08-22 16:57:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:10,178 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-22 16:57:10,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:57:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-22 16:57:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:57:10,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:10,180 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:10,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:10,396 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2020-08-22 16:57:10,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:10,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917301095] [2020-08-22 16:57:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:10,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:10,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917301095] [2020-08-22 16:57:10,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385020683] [2020-08-22 16:57:10,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:57:10,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:10,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:57:10,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:10,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:10,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-08-22 16:57:10,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881947605] [2020-08-22 16:57:10,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:57:10,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:57:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:10,542 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-08-22 16:57:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:10,582 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-22 16:57:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:57:10,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 16:57:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:10,584 INFO L225 Difference]: With dead ends: 39 [2020-08-22 16:57:10,584 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:57:10,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:57:10,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:57:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-08-22 16:57:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:57:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-22 16:57:10,591 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-22 16:57:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-22 16:57:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:57:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-22 16:57:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:57:10,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:10,593 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:10,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:10,803 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2020-08-22 16:57:10,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:10,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362354034] [2020-08-22 16:57:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:10,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362354034] [2020-08-22 16:57:10,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594619707] [2020-08-22 16:57:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:57:10,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-08-22 16:57:10,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:10,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:10,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-08-22 16:57:10,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846851043] [2020-08-22 16:57:10,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:57:10,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:57:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:10,931 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-08-22 16:57:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:10,982 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-22 16:57:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:57:10,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-22 16:57:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:10,984 INFO L225 Difference]: With dead ends: 42 [2020-08-22 16:57:10,984 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 16:57:10,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 16:57:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 16:57:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:57:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-22 16:57:10,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-08-22 16:57:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:10,991 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-22 16:57:10,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:57:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-22 16:57:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:57:10,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:10,993 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:11,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 16:57:11,205 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2020-08-22 16:57:11,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:11,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752763733] [2020-08-22 16:57:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752763733] [2020-08-22 16:57:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119903915] [2020-08-22 16:57:11,315 INFO L93 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 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 [2020-08-22 16:57:11,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:57:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:57:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:11,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-08-22 16:57:11,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177158261] [2020-08-22 16:57:11,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:57:11,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:57:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:11,408 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-08-22 16:57:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:11,453 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-22 16:57:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:57:11,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-22 16:57:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:11,455 INFO L225 Difference]: With dead ends: 45 [2020-08-22 16:57:11,455 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 16:57:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 16:57:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-22 16:57:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:57:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 16:57:11,462 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-22 16:57:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:11,462 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 16:57:11,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:57:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 16:57:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:57:11,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:11,463 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:11,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:11,680 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:11,680 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2020-08-22 16:57:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:11,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915266767] [2020-08-22 16:57:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915266767] [2020-08-22 16:57:11,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089310760] [2020-08-22 16:57:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:11,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-08-22 16:57:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2020-08-22 16:57:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:11,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-08-22 16:57:11,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268297613] [2020-08-22 16:57:11,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:57:11,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:57:11,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:11,826 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2020-08-22 16:57:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:11,880 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-08-22 16:57:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:57:11,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-08-22 16:57:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:11,881 INFO L225 Difference]: With dead ends: 48 [2020-08-22 16:57:11,881 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 16:57:11,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 16:57:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 16:57:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:57:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 16:57:11,888 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-08-22 16:57:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:11,889 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 16:57:11,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:57:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 16:57:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:57:11,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:11,890 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:12,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:12,104 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2020-08-22 16:57:12,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:12,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870410054] [2020-08-22 16:57:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:12,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:12,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870410054] [2020-08-22 16:57:12,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276241042] [2020-08-22 16:57:12,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-08-22 16:57:12,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-08-22 16:57:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:12,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:57:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:12,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:12,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-08-22 16:57:12,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106137642] [2020-08-22 16:57:12,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:57:12,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:57:12,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:57:12,259 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-08-22 16:57:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:12,315 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-08-22 16:57:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:57:12,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-22 16:57:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:12,317 INFO L225 Difference]: With dead ends: 51 [2020-08-22 16:57:12,317 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 16:57:12,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:57:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 16:57:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-08-22 16:57:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:57:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 16:57:12,323 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-08-22 16:57:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:12,324 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 16:57:12,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:57:12,324 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 16:57:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 16:57:12,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:12,325 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:12,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-08-22 16:57:12,538 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2020-08-22 16:57:12,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:12,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365576117] [2020-08-22 16:57:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:12,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:57:12,570 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:57:12,591 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:57:12,591 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:57:12,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 16:57:12,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:12 BoogieIcfgContainer [2020-08-22 16:57:12,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:12,643 INFO L168 Benchmark]: Toolchain (without parser) took 6074.25 ms. Allocated memory was 140.0 MB in the beginning and 248.0 MB in the end (delta: 108.0 MB). Free memory was 103.0 MB in the beginning and 155.4 MB in the end (delta: -52.4 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,644 INFO L168 Benchmark]: CDTParser took 1.14 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,645 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.42 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,646 INFO L168 Benchmark]: Boogie Preprocessor took 108.95 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 182.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,652 INFO L168 Benchmark]: RCFGBuilder took 254.40 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,657 INFO L168 Benchmark]: TraceAbstraction took 5481.17 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.6 MB in the beginning and 155.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 59.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:12,663 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.14 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.42 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.95 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.4 MB in the beginning and 182.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.40 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.6 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5481.17 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.6 MB in the beginning and 155.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 59.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=2, n=10] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=4, n=10] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=6, n=10] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=10, n=8] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=16, n=10] [L13] i++ VAL [i=9, n=16, n=10] [L13] COND TRUE i<=n VAL [i=9, n=10, n=16] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=18, n=10] [L14] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L13] i++ VAL [i=11, n=18, n=10] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 61 SDslu, 439 SDs, 0 SdLazy, 543 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 29868 SizeOfPredicates, 12 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 145/780 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...