/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -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 [2020-08-19 04:22:48,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:22:48,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:22:48,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:22:48,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:22:48,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:22:48,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:22:48,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:22:48,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:22:48,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:22:48,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:22:48,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:22:48,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:22:48,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:22:48,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:22:48,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:22:48,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:22:48,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:22:48,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:22:48,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:22:48,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:22:48,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:22:48,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:22:48,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:22:48,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:22:48,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:22:48,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:22:48,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:22:48,941 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 [2020-08-19 04:22:48,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:22:48,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:22:48,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:22:48,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:22:48,966 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:22:48,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:22:48,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:22:48,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:22:48,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:22:48,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:22:48,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:22:48,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:22:48,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:22:48,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:22:48,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:22:48,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:22:48,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:22:48,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:22:48,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:22:48,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:22:48,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:22:48,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:22:48,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:22:48,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:22:48,971 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:22:49,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:22:49,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:22:49,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:22:49,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:22:49,305 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:22:49,306 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-19 04:22:49,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4083ca250/5a7d7e59cc2642c7bb9a3b898056cbb0/FLAGba1278db5 [2020-08-19 04:22:49,793 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:22:49,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-19 04:22:49,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4083ca250/5a7d7e59cc2642c7bb9a3b898056cbb0/FLAGba1278db5 [2020-08-19 04:22:50,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4083ca250/5a7d7e59cc2642c7bb9a3b898056cbb0 [2020-08-19 04:22:50,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:22:50,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:22:50,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:50,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:22:50,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:22:50,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d7d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50, skipping insertion in model container [2020-08-19 04:22:50,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:22:50,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:22:50,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:50,404 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:22:50,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:22:50,433 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:22:50,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50 WrapperNode [2020-08-19 04:22:50,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:22:50,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:22:50,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:22:50,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:22:50,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (1/1) ... [2020-08-19 04:22:50,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:22:50,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:22:50,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:22:50,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:22:50,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (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 [2020-08-19 04:22:50,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:22:50,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:22:50,605 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 04:22:50,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:22:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 04:22:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:22:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 04:22:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:22:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:22:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:22:50,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:22:50,763 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 04:22:50,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:50 BoogieIcfgContainer [2020-08-19 04:22:50,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:22:50,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:22:50,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:22:50,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:22:50,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:22:50" (1/3) ... [2020-08-19 04:22:50,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25299fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:50, skipping insertion in model container [2020-08-19 04:22:50,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:22:50" (2/3) ... [2020-08-19 04:22:50,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25299fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:22:50, skipping insertion in model container [2020-08-19 04:22:50,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:22:50" (3/3) ... [2020-08-19 04:22:50,776 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-19 04:22:50,786 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:22:50,794 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:22:50,807 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:22:50,839 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:22:50,840 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:22:50,840 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:22:50,841 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:22:50,841 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:22:50,841 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:22:50,841 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:22:50,841 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:22:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 04:22:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 04:22:50,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:50,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:50,872 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 04:22:50,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:50,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242960232] [2020-08-19 04:22:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:22:51,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242960232] [2020-08-19 04:22:51,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:22:51,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:22:51,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102476322] [2020-08-19 04:22:51,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:22:51,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:22:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:22:51,263 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 04:22:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:51,324 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-19 04:22:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:22:51,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 04:22:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:51,335 INFO L225 Difference]: With dead ends: 32 [2020-08-19 04:22:51,336 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 04:22:51,339 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 [2020-08-19 04:22:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 04:22:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 04:22:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 04:22:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 04:22:51,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 04:22:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:51,386 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 04:22:51,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:22:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 04:22:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:22:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:51,389 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:51,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:22:51,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 04:22:51,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:51,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330048923] [2020-08-19 04:22:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 04:22:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330048923] [2020-08-19 04:22:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:51,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:22:51,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697499887] [2020-08-19 04:22:51,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:22:51,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:22:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:51,610 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-19 04:22:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:51,641 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 04:22:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:22:51,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-19 04:22:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:51,643 INFO L225 Difference]: With dead ends: 25 [2020-08-19 04:22:51,643 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 04:22:51,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:22:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 04:22:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 04:22:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 04:22:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 04:22:51,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 04:22:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:51,652 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 04:22:51,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:22:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 04:22:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:22:51,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:51,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:51,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:22:51,655 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 04:22:51,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:51,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219296348] [2020-08-19 04:22:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 04:22:51,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219296348] [2020-08-19 04:22:51,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:51,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:22:51,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538006731] [2020-08-19 04:22:51,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:22:51,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:22:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:22:51,890 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-19 04:22:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:51,932 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 04:22:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:22:51,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-19 04:22:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:51,935 INFO L225 Difference]: With dead ends: 28 [2020-08-19 04:22:51,935 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 04:22:51,936 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 [2020-08-19 04:22:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 04:22:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 04:22:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 04:22:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 04:22:51,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 04:22:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:51,943 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 04:22:51,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:22:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 04:22:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 04:22:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:51,945 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:51,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:22:51,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 04:22:51,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:51,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282998774] [2020-08-19 04:22:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 04:22:52,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282998774] [2020-08-19 04:22:52,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:52,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:22:52,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209560418] [2020-08-19 04:22:52,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:22:52,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:52,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:22:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:22:52,230 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-19 04:22:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:52,290 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 04:22:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:22:52,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-19 04:22:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:52,292 INFO L225 Difference]: With dead ends: 31 [2020-08-19 04:22:52,292 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 04:22:52,293 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 [2020-08-19 04:22:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 04:22:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 04:22:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 04:22:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 04:22:52,299 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 04:22:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:52,300 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 04:22:52,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:22:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 04:22:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 04:22:52,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:52,302 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:52,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:22:52,302 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:52,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 04:22:52,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:52,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596400249] [2020-08-19 04:22:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 04:22:52,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596400249] [2020-08-19 04:22:52,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:52,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:22:52,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708510893] [2020-08-19 04:22:52,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:22:52,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:52,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:22:52,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:22:52,593 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-19 04:22:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:52,666 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 04:22:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:22:52,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-19 04:22:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:52,668 INFO L225 Difference]: With dead ends: 34 [2020-08-19 04:22:52,668 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:22:52,669 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 [2020-08-19 04:22:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:22:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 04:22:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 04:22:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 04:22:52,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 04:22:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:52,676 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 04:22:52,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:22:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 04:22:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 04:22:52,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:52,678 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:52,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:22:52,678 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 04:22:52,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:52,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345036013] [2020-08-19 04:22:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:52,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 04:22:53,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345036013] [2020-08-19 04:22:53,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:53,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:22:53,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676935853] [2020-08-19 04:22:53,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:22:53,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:22:53,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:22:53,024 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-19 04:22:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:53,136 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 04:22:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:22:53,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-19 04:22:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:53,138 INFO L225 Difference]: With dead ends: 37 [2020-08-19 04:22:53,139 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 04:22:53,139 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 [2020-08-19 04:22:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 04:22:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 04:22:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 04:22:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 04:22:53,145 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 04:22:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:53,146 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 04:22:53,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:22:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 04:22:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 04:22:53,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:53,147 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:53,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:22:53,148 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:53,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 04:22:53,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:53,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925983877] [2020-08-19 04:22:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 04:22:53,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925983877] [2020-08-19 04:22:53,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:53,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:22:53,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729397643] [2020-08-19 04:22:53,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:22:53,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:22:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:22:53,514 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-19 04:22:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:53,632 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 04:22:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:22:53,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-19 04:22:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:53,634 INFO L225 Difference]: With dead ends: 40 [2020-08-19 04:22:53,634 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 04:22:53,635 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 [2020-08-19 04:22:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 04:22:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 04:22:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 04:22:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 04:22:53,641 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 04:22:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:53,642 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 04:22:53,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:22:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 04:22:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 04:22:53,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:53,643 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:53,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:22:53,644 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 04:22:53,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:53,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396924985] [2020-08-19 04:22:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:53,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 04:22:54,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396924985] [2020-08-19 04:22:54,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:54,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:22:54,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85900451] [2020-08-19 04:22:54,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:22:54,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:22:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:22:54,113 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-19 04:22:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:54,266 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 04:22:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:22:54,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-19 04:22:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:54,269 INFO L225 Difference]: With dead ends: 43 [2020-08-19 04:22:54,269 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 04:22:54,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:22:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 04:22:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 04:22:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 04:22:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 04:22:54,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 04:22:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:54,277 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 04:22:54,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:22:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 04:22:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 04:22:54,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:54,279 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:54,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:22:54,279 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 04:22:54,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:54,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449434254] [2020-08-19 04:22:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 04:22:54,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449434254] [2020-08-19 04:22:54,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:54,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:22:54,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564966820] [2020-08-19 04:22:54,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:22:54,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:22:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:22:54,909 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-19 04:22:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:55,083 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 04:22:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:22:55,083 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-19 04:22:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:55,089 INFO L225 Difference]: With dead ends: 46 [2020-08-19 04:22:55,090 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 04:22:55,090 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 [2020-08-19 04:22:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 04:22:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 04:22:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 04:22:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 04:22:55,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 04:22:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:55,103 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 04:22:55,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:22:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 04:22:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:22:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:55,105 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:55,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:22:55,106 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 04:22:55,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:55,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658919651] [2020-08-19 04:22:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:22:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:22:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 04:22:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:22:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 04:22:55,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658919651] [2020-08-19 04:22:55,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:22:55,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:22:55,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9393741] [2020-08-19 04:22:55,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:22:55,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:22:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:22:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:22:55,778 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-19 04:22:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:22:56,019 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 04:22:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:22:56,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-19 04:22:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:22:56,021 INFO L225 Difference]: With dead ends: 49 [2020-08-19 04:22:56,021 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 04:22:56,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:22:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 04:22:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 04:22:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 04:22:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 04:22:56,028 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 04:22:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:22:56,029 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 04:22:56,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:22:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 04:22:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 04:22:56,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:22:56,030 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:22:56,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:22:56,031 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:22:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:22:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 04:22:56,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:22:56,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103765062] [2020-08-19 04:22:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:22:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:22:56,076 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:22:56,077 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:22:56,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:22:56,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:22:56 BoogieIcfgContainer [2020-08-19 04:22:56,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:22:56,132 INFO L168 Benchmark]: Toolchain (without parser) took 5924.45 ms. Allocated memory was 138.4 MB in the beginning and 291.5 MB in the end (delta: 153.1 MB). Free memory was 101.7 MB in the beginning and 192.8 MB in the end (delta: -91.0 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:56,133 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:22:56,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.59 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:56,137 INFO L168 Benchmark]: Boogie Preprocessor took 24.39 ms. Allocated memory is still 138.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:56,140 INFO L168 Benchmark]: RCFGBuilder took 308.85 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 169.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:56,141 INFO L168 Benchmark]: TraceAbstraction took 5359.37 ms. Allocated memory was 200.8 MB in the beginning and 291.5 MB in the end (delta: 90.7 MB). Free memory was 169.1 MB in the beginning and 192.8 MB in the end (delta: -23.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:22:56,150 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.59 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.39 ms. Allocated memory is still 138.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.85 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 169.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5359.37 ms. Allocated memory was 200.8 MB in the beginning and 291.5 MB in the end (delta: 90.7 MB). Free memory was 169.1 MB in the beginning and 192.8 MB in the end (delta: -23.6 MB). Peak memory consumption was 67.1 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: 5.2s, 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, 2.1s 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, 3.5s 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...