/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:39:04,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:39:04,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:39:04,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:39:04,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:39:04,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:39:04,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:39:04,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:39:04,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:39:04,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:39:04,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:39:04,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:39:04,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:39:04,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:39:04,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:39:04,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:39:04,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:39:04,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:39:04,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:39:04,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:39:04,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:39:04,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:39:04,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:39:04,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:39:04,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:39:04,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:39:04,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:39:04,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:39:04,868 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 23:39:04,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:39:04,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:39:04,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:39:04,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:39:04,896 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:39:04,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:39:04,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:39:04,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:39:04,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:39:04,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:39:04,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:39:04,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:39:04,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:39:04,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:39:04,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:39:04,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:39:04,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:39:04,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:39:04,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:39:04,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:39:04,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:39:04,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:39:04,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:39:04,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:39:04,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:39:04,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:39:04,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:39:04,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:39:04,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:39:04,906 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=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:39:05,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:39:05,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:39:05,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:39:05,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:39:05,262 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:39:05,263 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 23:39:05,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550502f22/9c6e5efc2e9647bb971a99b23946484a/FLAG85d19556e [2020-08-18 23:39:05,784 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:39:05,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-18 23:39:05,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550502f22/9c6e5efc2e9647bb971a99b23946484a/FLAG85d19556e [2020-08-18 23:39:06,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550502f22/9c6e5efc2e9647bb971a99b23946484a [2020-08-18 23:39:06,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:39:06,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:39:06,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:06,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:39:06,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:39:06,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31653048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06, skipping insertion in model container [2020-08-18 23:39:06,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:39:06,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:39:06,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:06,437 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:39:06,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:06,462 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:39:06,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06 WrapperNode [2020-08-18 23:39:06,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:06,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:39:06,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:39:06,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:39:06,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (1/1) ... [2020-08-18 23:39:06,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:39:06,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:39:06,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:39:06,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:39:06,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (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 23:39:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:39:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:39:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:39:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:39:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:39:06,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:39:06,824 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:39:06,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:06 BoogieIcfgContainer [2020-08-18 23:39:06,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:39:06,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:39:06,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:39:06,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:39:06,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:39:06" (1/3) ... [2020-08-18 23:39:06,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ed740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:06, skipping insertion in model container [2020-08-18 23:39:06,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:06" (2/3) ... [2020-08-18 23:39:06,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ed740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:06, skipping insertion in model container [2020-08-18 23:39:06,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:06" (3/3) ... [2020-08-18 23:39:06,836 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-18 23:39:06,848 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:39:06,855 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:39:06,870 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:39:06,914 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:39:06,914 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:39:06,914 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:39:06,915 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:39:06,915 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:39:06,915 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:39:06,915 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:39:06,916 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:39:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 23:39:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 23:39:06,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:06,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:06,954 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-08-18 23:39:06,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:06,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867259400] [2020-08-18 23:39:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,122 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 23:39:07,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867259400] [2020-08-18 23:39:07,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:07,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 23:39:07,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210316851] [2020-08-18 23:39:07,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 23:39:07,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 23:39:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 23:39:07,156 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 23:39:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:07,190 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 23:39:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 23:39:07,192 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 23:39:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:07,203 INFO L225 Difference]: With dead ends: 31 [2020-08-18 23:39:07,204 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 23:39:07,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 23:39:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 23:39:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 23:39:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 23:39:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-18 23:39:07,267 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-18 23:39:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:07,268 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-18 23:39:07,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 23:39:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-18 23:39:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 23:39:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:07,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:07,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:39:07,273 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-08-18 23:39:07,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:07,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822327460] [2020-08-18 23:39:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,425 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 23:39:07,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822327460] [2020-08-18 23:39:07,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:07,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:39:07,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277296524] [2020-08-18 23:39:07,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:39:07,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:39:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:39:07,431 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-08-18 23:39:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:07,475 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-18 23:39:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:39:07,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 23:39:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:07,477 INFO L225 Difference]: With dead ends: 23 [2020-08-18 23:39:07,477 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 23:39:07,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:39:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 23:39:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 23:39:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 23:39:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 23:39:07,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-18 23:39:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:07,485 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 23:39:07,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:39:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 23:39:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:39:07,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:07,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:07,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:39:07,487 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-08-18 23:39:07,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:07,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476445102] [2020-08-18 23:39:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:07,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476445102] [2020-08-18 23:39:07,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:07,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:39:07,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067444447] [2020-08-18 23:39:07,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:39:07,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:07,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:39:07,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:39:07,749 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-08-18 23:39:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:07,866 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-18 23:39:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:39:07,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-18 23:39:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:07,869 INFO L225 Difference]: With dead ends: 33 [2020-08-18 23:39:07,870 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 23:39:07,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:39:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 23:39:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-08-18 23:39:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 23:39:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 23:39:07,878 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-08-18 23:39:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:07,879 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 23:39:07,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:39:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 23:39:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:39:07,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:07,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:07,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:39:07,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-08-18 23:39:07,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:07,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875728638] [2020-08-18 23:39:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-18 23:39:07,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875728638] [2020-08-18 23:39:07,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:39:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090602077] [2020-08-18 23:39:07,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:39:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:39:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:39:07,921 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-08-18 23:39:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:07,941 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 23:39:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:39:07,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 23:39:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:07,943 INFO L225 Difference]: With dead ends: 32 [2020-08-18 23:39:07,943 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 23:39:07,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:39:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 23:39:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 23:39:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 23:39:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-18 23:39:07,949 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-08-18 23:39:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:07,950 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-18 23:39:07,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:39:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-18 23:39:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:39:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:07,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:07,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:39:07,952 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-08-18 23:39:07,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:07,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081359434] [2020-08-18 23:39:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:08,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081359434] [2020-08-18 23:39:08,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:08,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:39:08,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35158282] [2020-08-18 23:39:08,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:39:08,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:39:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:39:08,039 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-18 23:39:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:08,094 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 23:39:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:39:08,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 23:39:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:08,097 INFO L225 Difference]: With dead ends: 30 [2020-08-18 23:39:08,097 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 23:39:08,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:39:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 23:39:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 23:39:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 23:39:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-18 23:39:08,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-18 23:39:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:08,111 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-18 23:39:08,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:39:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-18 23:39:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:39:08,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:08,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:08,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:39:08,115 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-08-18 23:39:08,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:08,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287207739] [2020-08-18 23:39:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 23:39:08,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287207739] [2020-08-18 23:39:08,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:08,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:39:08,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289174923] [2020-08-18 23:39:08,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:39:08,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:39:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:39:08,429 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-18 23:39:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:08,583 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-08-18 23:39:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:39:08,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-18 23:39:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:08,585 INFO L225 Difference]: With dead ends: 31 [2020-08-18 23:39:08,585 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 23:39:08,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:39:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 23:39:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-18 23:39:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 23:39:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-18 23:39:08,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-08-18 23:39:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:08,591 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-18 23:39:08,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:39:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-18 23:39:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:39:08,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:08,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:08,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:39:08,593 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-08-18 23:39:08,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:08,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722613039] [2020-08-18 23:39:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:08,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722613039] [2020-08-18 23:39:08,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:08,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:39:08,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988530558] [2020-08-18 23:39:08,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:39:08,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:39:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:39:08,654 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-18 23:39:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:08,688 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-18 23:39:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:39:08,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 23:39:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:08,689 INFO L225 Difference]: With dead ends: 38 [2020-08-18 23:39:08,690 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 23:39:08,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:39:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 23:39:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 23:39:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 23:39:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-18 23:39:08,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-08-18 23:39:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:08,696 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-18 23:39:08,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:39:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-18 23:39:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:39:08,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:08,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:08,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:39:08,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:08,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-08-18 23:39:08,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:08,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096113824] [2020-08-18 23:39:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:08,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096113824] [2020-08-18 23:39:08,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:08,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:39:08,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949320276] [2020-08-18 23:39:08,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:39:08,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:08,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:39:08,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:39:08,776 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-08-18 23:39:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:08,831 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-08-18 23:39:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:39:08,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-18 23:39:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:08,832 INFO L225 Difference]: With dead ends: 42 [2020-08-18 23:39:08,833 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 23:39:08,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:39:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 23:39:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 23:39:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 23:39:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-18 23:39:08,839 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-08-18 23:39:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:08,839 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-18 23:39:08,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:39:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-18 23:39:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:39:08,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:08,841 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:08,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:39:08,841 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-08-18 23:39:08,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:08,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43013497] [2020-08-18 23:39:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:08,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43013497] [2020-08-18 23:39:08,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:08,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:39:08,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438724122] [2020-08-18 23:39:08,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:39:08,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:39:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:39:08,993 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-08-18 23:39:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:09,062 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 23:39:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:39:09,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-18 23:39:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:09,064 INFO L225 Difference]: With dead ends: 46 [2020-08-18 23:39:09,064 INFO L226 Difference]: Without dead ends: 37 [2020-08-18 23:39:09,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:39:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-18 23:39:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-18 23:39:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 23:39:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-18 23:39:09,072 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-08-18 23:39:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:09,072 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-18 23:39:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:39:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-18 23:39:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 23:39:09,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:09,074 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:09,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:39:09,074 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-08-18 23:39:09,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:09,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158818797] [2020-08-18 23:39:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:39:09,115 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:39:09,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:39:09,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:39:09,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:39:09 BoogieIcfgContainer [2020-08-18 23:39:09,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:39:09,153 INFO L168 Benchmark]: Toolchain (without parser) took 2943.35 ms. Allocated memory was 138.9 MB in the beginning and 233.3 MB in the end (delta: 94.4 MB). Free memory was 101.8 MB in the beginning and 97.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 99.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:09,154 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:39:09,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.26 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:09,156 INFO L168 Benchmark]: Boogie Preprocessor took 108.53 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 180.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:09,161 INFO L168 Benchmark]: RCFGBuilder took 255.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 167.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:09,163 INFO L168 Benchmark]: TraceAbstraction took 2320.22 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.7 MB in the beginning and 97.0 MB in the end (delta: 70.6 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:09,175 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.26 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.53 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 180.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 255.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 167.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2320.22 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.7 MB in the beginning and 97.0 MB in the end (delta: 70.6 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i