/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:41:13,086 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 18:41:13,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:41:13,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:41:13,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:41:13,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:41:13,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:41:13,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:41:13,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:41:13,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:41:13,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:41:13,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:41:13,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:41:13,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:41:13,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:41:13,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:41:13,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:41:13,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:41:13,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:41:13,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:41:13,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:41:13,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:41:13,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:41:13,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:41:13,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:41:13,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:41:13,201 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 [2020-08-18 18:41:13,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:41:13,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:41:13,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:41:13,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:41:13,225 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:41:13,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:41:13,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:41:13,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:41:13,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:41:13,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:41:13,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:41:13,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:41:13,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:41:13,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:41:13,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:41:13,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:41:13,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:41:13,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:41:13,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:41:13,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:41:13,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:41:13,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:41:13,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:41:13,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:41:13,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:41:13,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:41:13,558 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:41:13,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:41:13,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:41:13,564 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:41:13,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-18 18:41:13,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d827d8/87fd5b4231434e34a46d8e676a8f8b6e/FLAGb1457be39 [2020-08-18 18:41:14,111 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:41:14,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-18 18:41:14,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d827d8/87fd5b4231434e34a46d8e676a8f8b6e/FLAGb1457be39 [2020-08-18 18:41:14,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/507d827d8/87fd5b4231434e34a46d8e676a8f8b6e [2020-08-18 18:41:14,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:41:14,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:41:14,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:14,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:41:14,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:41:14,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1982a2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14, skipping insertion in model container [2020-08-18 18:41:14,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:41:14,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:41:14,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:14,779 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:41:14,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:14,808 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:41:14,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14 WrapperNode [2020-08-18 18:41:14,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:14,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:41:14,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:41:14,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:41:14,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (1/1) ... [2020-08-18 18:41:14,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:41:14,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:41:14,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:41:14,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:41:14,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (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 [2020-08-18 18:41:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:41:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:41:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 18:41:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:41:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:41:15,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:41:15,120 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:41:15,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:15 BoogieIcfgContainer [2020-08-18 18:41:15,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:41:15,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:41:15,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:41:15,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:41:15,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:41:14" (1/3) ... [2020-08-18 18:41:15,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1460ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:15, skipping insertion in model container [2020-08-18 18:41:15,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:14" (2/3) ... [2020-08-18 18:41:15,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1460ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:15, skipping insertion in model container [2020-08-18 18:41:15,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:15" (3/3) ... [2020-08-18 18:41:15,132 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-18 18:41:15,143 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:41:15,150 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:41:15,165 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:41:15,189 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:41:15,190 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:41:15,190 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:41:15,190 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:41:15,190 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:41:15,190 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:41:15,191 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:41:15,191 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:41:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 18:41:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:41:15,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:15,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:15,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 18:41:15,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:15,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257026850] [2020-08-18 18:41:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:41:15,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257026850] [2020-08-18 18:41:15,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:15,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:15,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409937326] [2020-08-18 18:41:15,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:15,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:15,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:15,620 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 18:41:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:15,680 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-18 18:41:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:15,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:41:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:15,700 INFO L225 Difference]: With dead ends: 32 [2020-08-18 18:41:15,701 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 18:41:15,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 18:41:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 18:41:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:41:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 18:41:15,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 18:41:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:15,758 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 18:41:15,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 18:41:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:41:15,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:15,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:15,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:41:15,762 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 18:41:15,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:15,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628857736] [2020-08-18 18:41:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:41:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628857736] [2020-08-18 18:41:15,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:15,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:41:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712519316] [2020-08-18 18:41:15,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:41:15,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:41:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:41:15,957 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-18 18:41:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:15,988 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 18:41:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:41:15,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-18 18:41:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:15,990 INFO L225 Difference]: With dead ends: 25 [2020-08-18 18:41:15,990 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 18:41:15,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:41:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 18:41:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 18:41:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:41:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 18:41:15,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 18:41:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:15,999 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 18:41:15,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:41:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 18:41:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:41:16,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:16,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:16,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:41:16,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 18:41:16,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:16,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58849095] [2020-08-18 18:41:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:41:16,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58849095] [2020-08-18 18:41:16,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:16,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:41:16,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480341537] [2020-08-18 18:41:16,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:41:16,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:41:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:41:16,260 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-18 18:41:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:16,308 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 18:41:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:41:16,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-18 18:41:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:16,310 INFO L225 Difference]: With dead ends: 28 [2020-08-18 18:41:16,311 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 18:41:16,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:41:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 18:41:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 18:41:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 18:41:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 18:41:16,319 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 18:41:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:16,320 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 18:41:16,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:41:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 18:41:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:41:16,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:16,322 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:16,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:41:16,322 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 18:41:16,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:16,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3099554] [2020-08-18 18:41:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 18:41:16,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3099554] [2020-08-18 18:41:16,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:16,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:41:16,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965344981] [2020-08-18 18:41:16,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:41:16,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:41:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:41:16,669 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-18 18:41:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:16,743 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 18:41:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:41:16,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-18 18:41:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:16,746 INFO L225 Difference]: With dead ends: 31 [2020-08-18 18:41:16,746 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 18:41:16,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:41:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 18:41:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 18:41:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 18:41:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 18:41:16,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 18:41:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:16,755 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 18:41:16,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:41:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 18:41:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 18:41:16,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:16,757 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:16,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:41:16,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 18:41:16,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:16,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129765182] [2020-08-18 18:41:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:16,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 18:41:17,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129765182] [2020-08-18 18:41:17,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:17,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:41:17,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287941576] [2020-08-18 18:41:17,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:41:17,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:41:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:41:17,111 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-18 18:41:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:17,200 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 18:41:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 18:41:17,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-18 18:41:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:17,203 INFO L225 Difference]: With dead ends: 34 [2020-08-18 18:41:17,203 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 18:41:17,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:41:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 18:41:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 18:41:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:41:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 18:41:17,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 18:41:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:17,223 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 18:41:17,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:41:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 18:41:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 18:41:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:17,225 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:17,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:41:17,225 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 18:41:17,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:17,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178717976] [2020-08-18 18:41:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 18:41:17,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178717976] [2020-08-18 18:41:17,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:17,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 18:41:17,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622713095] [2020-08-18 18:41:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:41:17,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:41:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:41:17,617 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-18 18:41:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:17,721 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 18:41:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:41:17,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-18 18:41:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:17,722 INFO L225 Difference]: With dead ends: 37 [2020-08-18 18:41:17,723 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 18:41:17,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:41:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 18:41:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 18:41:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 18:41:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 18:41:17,730 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 18:41:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:17,731 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 18:41:17,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:41:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 18:41:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 18:41:17,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:17,733 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:17,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:41:17,733 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 18:41:17,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:17,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164155818] [2020-08-18 18:41:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:17,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 18:41:18,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164155818] [2020-08-18 18:41:18,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:18,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 18:41:18,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939791371] [2020-08-18 18:41:18,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 18:41:18,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 18:41:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:18,125 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-18 18:41:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:18,248 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 18:41:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 18:41:18,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-18 18:41:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:18,250 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:41:18,250 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 18:41:18,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 18:41:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 18:41:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 18:41:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 18:41:18,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 18:41:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:18,257 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 18:41:18,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 18:41:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 18:41:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 18:41:18,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:18,259 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:18,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:41:18,260 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 18:41:18,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:18,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814684444] [2020-08-18 18:41:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 18:41:18,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814684444] [2020-08-18 18:41:18,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:18,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 18:41:18,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307710094] [2020-08-18 18:41:18,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 18:41:18,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 18:41:18,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:41:18,764 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-18 18:41:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:18,917 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 18:41:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 18:41:18,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-18 18:41:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:18,919 INFO L225 Difference]: With dead ends: 43 [2020-08-18 18:41:18,919 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 18:41:18,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:41:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 18:41:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 18:41:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 18:41:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 18:41:18,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 18:41:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:18,927 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 18:41:18,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 18:41:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 18:41:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 18:41:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:18,929 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:18,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:41:18,930 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 18:41:18,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:18,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999335675] [2020-08-18 18:41:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:18,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 18:41:19,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999335675] [2020-08-18 18:41:19,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:19,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 18:41:19,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771709279] [2020-08-18 18:41:19,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 18:41:19,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 18:41:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:41:19,482 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-18 18:41:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:19,650 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 18:41:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:41:19,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-18 18:41:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:19,652 INFO L225 Difference]: With dead ends: 46 [2020-08-18 18:41:19,652 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 18:41:19,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:41:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 18:41:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 18:41:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 18:41:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 18:41:19,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 18:41:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:19,664 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 18:41:19,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 18:41:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 18:41:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 18:41:19,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:19,666 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:19,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:41:19,667 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 18:41:19,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:19,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684387420] [2020-08-18 18:41:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:19,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 18:41:20,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684387420] [2020-08-18 18:41:20,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:20,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 18:41:20,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811360249] [2020-08-18 18:41:20,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 18:41:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:20,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 18:41:20,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:41:20,349 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-18 18:41:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:20,559 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 18:41:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 18:41:20,560 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-18 18:41:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:20,561 INFO L225 Difference]: With dead ends: 49 [2020-08-18 18:41:20,561 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 18:41:20,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:41:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 18:41:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 18:41:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 18:41:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 18:41:20,569 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 18:41:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:20,570 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 18:41:20,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 18:41:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 18:41:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 18:41:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:20,571 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:20,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:41:20,572 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:20,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 18:41:20,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:20,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554036553] [2020-08-18 18:41:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:41:20,618 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:41:20,618 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:41:20,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:41:20,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:20 BoogieIcfgContainer [2020-08-18 18:41:20,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:20,652 INFO L168 Benchmark]: Toolchain (without parser) took 6079.58 ms. Allocated memory was 140.0 MB in the beginning and 283.1 MB in the end (delta: 143.1 MB). Free memory was 103.0 MB in the beginning and 154.2 MB in the end (delta: -51.1 MB). Peak memory consumption was 92.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:20,653 INFO L168 Benchmark]: CDTParser took 0.19 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. [2020-08-18 18:41:20,654 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.54 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:20,655 INFO L168 Benchmark]: Boogie Preprocessor took 26.85 ms. Allocated memory is still 140.0 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:20,655 INFO L168 Benchmark]: RCFGBuilder took 286.85 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 170.5 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:20,656 INFO L168 Benchmark]: TraceAbstraction took 5524.24 ms. Allocated memory was 201.9 MB in the beginning and 283.1 MB in the end (delta: 81.3 MB). Free memory was 169.8 MB in the beginning and 154.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 96.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:20,660 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 233.54 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.85 ms. Allocated memory is still 140.0 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 286.85 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 170.5 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5524.24 ms. Allocated memory was 201.9 MB in the beginning and 283.1 MB in the end (delta: 81.3 MB). Free memory was 169.8 MB in the beginning and 154.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 96.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2772 SDs, 0 SdLazy, 1181 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 69600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 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...