/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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:44:06,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:44:06,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:44:06,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:44:06,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:44:06,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:44:06,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:44:06,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:44:06,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:44:06,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:44:06,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:44:06,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:44:06,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:44:06,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:44:06,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:44:06,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:44:06,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:44:06,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:44:06,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:44:06,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:44:06,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:44:06,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:44:06,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:44:06,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:44:06,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:44:06,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:44:06,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:44:06,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:44:06,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:44:06,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:44:06,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:44:06,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:44:06,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:44:06,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:44:06,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:44:06,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:44:06,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:44:06,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:44:06,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:44:06,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:44:06,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:44:06,304 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:44:06,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:44:06,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:44:06,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:44:06,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:44:06,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:44:06,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:44:06,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:44:06,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:44:06,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:44:06,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:44:06,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:44:06,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:44:06,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:44:06,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:44:06,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:44:06,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:44:06,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:44:06,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:44:06,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:44:06,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:44:06,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:44:06,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:44:06,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:44:06,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:44:06,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:44:06,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:44:06,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:44:06,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:44:06,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:44:06,837 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:44:06,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-09-04 13:44:06,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f3c1b286/674dbb2352c448b8a709bbc73b8e7e16/FLAG6d581d656 [2020-09-04 13:44:07,501 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:44:07,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested6.i [2020-09-04 13:44:07,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f3c1b286/674dbb2352c448b8a709bbc73b8e7e16/FLAG6d581d656 [2020-09-04 13:44:07,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f3c1b286/674dbb2352c448b8a709bbc73b8e7e16 [2020-09-04 13:44:07,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:44:07,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:44:07,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:07,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:44:07,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:44:07,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:07" (1/1) ... [2020-09-04 13:44:07,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c5cb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:07, skipping insertion in model container [2020-09-04 13:44:07,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:44:07" (1/1) ... [2020-09-04 13:44:07,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:44:07,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:44:08,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:08,142 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:44:08,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:44:08,184 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:44:08,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08 WrapperNode [2020-09-04 13:44:08,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:44:08,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:44:08,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:44:08,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:44:08,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... [2020-09-04 13:44:08,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:44:08,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:44:08,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:44:08,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:44:08,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:44:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:44:08,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:44:08,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:44:08,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:44:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:44:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:44:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:44:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:44:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:44:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:44:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:44:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:44:08,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:44:08,632 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:44:08,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:08 BoogieIcfgContainer [2020-09-04 13:44:08,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:44:08,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:44:08,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:44:08,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:44:08,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:44:07" (1/3) ... [2020-09-04 13:44:08,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427f49c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:08, skipping insertion in model container [2020-09-04 13:44:08,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:44:08" (2/3) ... [2020-09-04 13:44:08,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427f49c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:44:08, skipping insertion in model container [2020-09-04 13:44:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:44:08" (3/3) ... [2020-09-04 13:44:08,675 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-09-04 13:44:08,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:44:08,720 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:44:08,749 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:44:08,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:44:08,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:44:08,777 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:44:08,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:44:08,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:44:08,777 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:44:08,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:44:08,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:44:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-04 13:44:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 13:44:08,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:08,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:08,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:08,813 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-09-04 13:44:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:08,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479674621] [2020-09-04 13:44:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:09,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479674621] [2020-09-04 13:44:09,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:09,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:44:09,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042779518] [2020-09-04 13:44:09,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:44:09,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:44:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:09,125 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-09-04 13:44:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:09,260 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-09-04 13:44:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:44:09,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-04 13:44:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:09,275 INFO L225 Difference]: With dead ends: 57 [2020-09-04 13:44:09,276 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 13:44:09,281 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 [2020-09-04 13:44:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 13:44:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-04 13:44:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 13:44:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-04 13:44:09,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-09-04 13:44:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:09,336 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-04 13:44:09,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:44:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-04 13:44:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 13:44:09,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:09,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:09,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:44:09,340 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-09-04 13:44:09,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:09,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749988543] [2020-09-04 13:44:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:09,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749988543] [2020-09-04 13:44:09,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:09,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:44:09,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215809279] [2020-09-04 13:44:09,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:09,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:09,445 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-04 13:44:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:09,605 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-09-04 13:44:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:09,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-04 13:44:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:09,608 INFO L225 Difference]: With dead ends: 40 [2020-09-04 13:44:09,608 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 13:44:09,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:44:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 13:44:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-09-04 13:44:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:44:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-04 13:44:09,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-09-04 13:44:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:09,620 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-04 13:44:09,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-04 13:44:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:44:09,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:09,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:09,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:44:09,622 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-09-04 13:44:09,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:09,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586487865] [2020-09-04 13:44:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 13:44:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:09,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586487865] [2020-09-04 13:44:09,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:09,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:44:09,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712173276] [2020-09-04 13:44:09,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:44:09,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:44:09,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:09,730 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-09-04 13:44:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:09,814 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-04 13:44:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:44:09,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-04 13:44:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:09,816 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:44:09,816 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 13:44:09,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 13:44:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-04 13:44:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 13:44:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-09-04 13:44:09,829 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-09-04 13:44:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:09,829 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-09-04 13:44:09,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:44:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-09-04 13:44:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:44:09,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:09,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:09,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:44:09,832 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:09,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-09-04 13:44:09,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:09,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504531318] [2020-09-04 13:44:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 13:44:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:44:09,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504531318] [2020-09-04 13:44:09,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:09,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:44:09,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077581083] [2020-09-04 13:44:09,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:44:09,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:09,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:44:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:44:09,902 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-09-04 13:44:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:10,050 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-09-04 13:44:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:10,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 13:44:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:10,052 INFO L225 Difference]: With dead ends: 97 [2020-09-04 13:44:10,053 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 13:44:10,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:44:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 13:44:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-09-04 13:44:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:44:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-09-04 13:44:10,067 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-09-04 13:44:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:10,067 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-09-04 13:44:10,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:44:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-09-04 13:44:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:44:10,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:10,069 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:10,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:44:10,070 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-09-04 13:44:10,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:10,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201434456] [2020-09-04 13:44:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:44:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:44:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:44:10,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201434456] [2020-09-04 13:44:10,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122748114] [2020-09-04 13:44:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:44:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:44:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:44:10,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:10,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-04 13:44:10,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715624621] [2020-09-04 13:44:10,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:10,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:10,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:10,315 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2020-09-04 13:44:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:10,407 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-09-04 13:44:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:10,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-04 13:44:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:10,410 INFO L225 Difference]: With dead ends: 80 [2020-09-04 13:44:10,410 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:44:10,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:44:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:44:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:44:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:44:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-09-04 13:44:10,422 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2020-09-04 13:44:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-09-04 13:44:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-09-04 13:44:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:44:10,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:10,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:10,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:10,638 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-09-04 13:44:10,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315781319] [2020-09-04 13:44:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:44:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 13:44:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:44:10,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315781319] [2020-09-04 13:44:10,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512768966] [2020-09-04 13:44:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:44:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:44:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:44:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:44:10,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:44:10,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-09-04 13:44:10,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758155052] [2020-09-04 13:44:10,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:44:10,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:44:10,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:44:10,967 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 13 states. [2020-09-04 13:44:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:11,227 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-09-04 13:44:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:44:11,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-09-04 13:44:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:11,230 INFO L225 Difference]: With dead ends: 120 [2020-09-04 13:44:11,230 INFO L226 Difference]: Without dead ends: 86 [2020-09-04 13:44:11,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:44:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-04 13:44:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-04 13:44:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 13:44:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-09-04 13:44:11,246 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 34 [2020-09-04 13:44:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:11,247 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-09-04 13:44:11,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:44:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-09-04 13:44:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:44:11,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:44:11,249 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:44:11,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:44:11,465 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:44:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:44:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-09-04 13:44:11,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:44:11,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742102793] [2020-09-04 13:44:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:44:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:11,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:44:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:44:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:44:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:44:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:44:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-04 13:44:11,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742102793] [2020-09-04 13:44:11,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:44:11,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:44:11,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670151901] [2020-09-04 13:44:11,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:44:11,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:44:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:44:11,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:44:11,594 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-09-04 13:44:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:44:11,672 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-09-04 13:44:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:44:11,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-04 13:44:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:44:11,674 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:44:11,685 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:44:11,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:44:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:44:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:44:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:44:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:44:11,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-09-04 13:44:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:44:11,688 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:44:11,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:44:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:44:11,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:44:11,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 13:44:11,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:44:12,082 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:44:12,082 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:44:12,082 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:44:12,082 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:44:12,083 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 13:44:12,083 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-09-04 13:44:12,084 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-09-04 13:44:12,084 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= .cse2 main_~j~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 .cse1 (<= main_~k~0 main_~n~0)) (and (<= main_~i~0 0) .cse0 .cse1 (<= main_~k~0 (+ .cse2 1)) (<= main_~k~0 main_~j~0))))) [2020-09-04 13:44:12,084 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-09-04 13:44:12,084 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-09-04 13:44:12,084 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-04 13:44:12,085 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-09-04 13:44:12,085 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-09-04 13:44:12,085 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-09-04 13:44:12,085 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-09-04 13:44:12,085 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-09-04 13:44:12,085 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-09-04 13:44:12,086 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-09-04 13:44:12,086 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse2 (<= main_~n~0 main_~j~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and (<= main_~i~0 0) .cse0 .cse1) (let ((.cse3 (div (+ (* main_~n~0 (- 1)) 1) (- 2)))) (and .cse2 .cse0 (<= (+ .cse3 1) main_~i~0) (<= .cse3 0) (<= main_~k~0 main_~i~0))) (and .cse2 .cse0 .cse1))) [2020-09-04 13:44:12,086 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-09-04 13:44:12,086 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-09-04 13:44:12,086 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-09-04 13:44:12,087 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 13:44:12,087 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:44:12,087 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-04 13:44:12,087 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-04 13:44:12,087 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-04 13:44:12,087 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-04 13:44:12,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:44:12 BoogieIcfgContainer [2020-09-04 13:44:12,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:44:12,116 INFO L168 Benchmark]: Toolchain (without parser) took 4253.46 ms. Allocated memory was 140.5 MB in the beginning and 244.8 MB in the end (delta: 104.3 MB). Free memory was 104.2 MB in the beginning and 170.8 MB in the end (delta: -66.6 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:12,117 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:44:12,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.84 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:12,119 INFO L168 Benchmark]: Boogie Preprocessor took 114.71 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:12,119 INFO L168 Benchmark]: RCFGBuilder took 338.20 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 167.3 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:12,121 INFO L168 Benchmark]: TraceAbstraction took 3457.03 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 166.6 MB in the beginning and 170.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:44:12,125 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.84 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.71 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 182.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.20 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 167.3 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3457.03 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 166.6 MB in the beginning and 170.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((i <= 0 && n <= k) && k <= n) || ((((n <= j && n <= k) && (n * -1 + 1) / -2 + 1 <= i) && (n * -1 + 1) / -2 <= 0) && k <= i)) || ((n <= j && n <= k) && k <= n) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((2 * i <= j && n <= k) && k <= n) || ((((i <= 0 && 2 * i <= j) && n <= k) && k <= 2 * i + 1) && k <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 96 SDslu, 493 SDs, 0 SdLazy, 375 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, 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, 7 MinimizatonAttempts, 56 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 33 PreInvPairs, 56 NumberOfFragments, 166 HoareAnnotationTreeSize, 33 FomulaSimplifications, 1880 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 373 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 14154 SizeOfPredicates, 7 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 73/81 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...