/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/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:31:12,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:31:12,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:31:12,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:31:12,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:31:12,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:31:12,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:31:12,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:31:12,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:31:12,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:31:12,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:31:12,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:31:12,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:31:12,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:31:12,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:31:12,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:31:12,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:31:12,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:31:12,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:31:12,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:31:12,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:31:12,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:31:12,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:31:12,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:31:12,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:31:12,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:31:12,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:31:12,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:31:12,879 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 04:31:12,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:31:12,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:31:12,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:31:12,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:31:12,927 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:31:12,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:31:12,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:31:12,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:31:12,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:31:12,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:31:12,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:31:12,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:31:12,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:31:12,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:31:12,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:31:12,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:31:12,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:31:12,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:31:12,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:31:12,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:31:12,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:31:12,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:31:12,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:31:12,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:31:12,933 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 04:31:13,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:31:13,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:31:13,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:31:13,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:31:13,272 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:31:13,273 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-19 04:31:13,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b81eda3ea/0c93d2ce4191411d955d3c6f732aeb0f/FLAG0c506d736 [2020-08-19 04:31:13,836 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:31:13,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-08-19 04:31:13,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b81eda3ea/0c93d2ce4191411d955d3c6f732aeb0f/FLAG0c506d736 [2020-08-19 04:31:14,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b81eda3ea/0c93d2ce4191411d955d3c6f732aeb0f [2020-08-19 04:31:14,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:31:14,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:31:14,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:14,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:31:14,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:31:14,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ba14b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14, skipping insertion in model container [2020-08-19 04:31:14,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:31:14,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:31:14,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:14,395 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:31:14,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:31:14,426 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:31:14,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14 WrapperNode [2020-08-19 04:31:14,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:31:14,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:31:14,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:31:14,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:31:14,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... [2020-08-19 04:31:14,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:31:14,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:31:14,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:31:14,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:31:14,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:31:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:31:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:31:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 04:31:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:31:14,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:31:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:31:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:31:14,788 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:31:14,788 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 04:31:14,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:14 BoogieIcfgContainer [2020-08-19 04:31:14,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:31:14,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:31:14,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:31:14,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:31:14,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:31:14" (1/3) ... [2020-08-19 04:31:14,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b7d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:14, skipping insertion in model container [2020-08-19 04:31:14,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:31:14" (2/3) ... [2020-08-19 04:31:14,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b7d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:31:14, skipping insertion in model container [2020-08-19 04:31:14,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:31:14" (3/3) ... [2020-08-19 04:31:14,800 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-08-19 04:31:14,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:31:14,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:31:14,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:31:14,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:31:14,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:31:14,876 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:31:14,876 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:31:14,876 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:31:14,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:31:14,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:31:14,877 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:31:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-19 04:31:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 04:31:14,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:14,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:14,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1782755915, now seen corresponding path program 1 times [2020-08-19 04:31:14,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:14,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663775172] [2020-08-19 04:31:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,120 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 04:31:15,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663775172] [2020-08-19 04:31:15,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:15,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:31:15,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61443046] [2020-08-19 04:31:15,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:31:15,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:31:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:31:15,144 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-08-19 04:31:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,176 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-08-19 04:31:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:31:15,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-19 04:31:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,185 INFO L225 Difference]: With dead ends: 31 [2020-08-19 04:31:15,186 INFO L226 Difference]: Without dead ends: 12 [2020-08-19 04:31:15,190 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 [2020-08-19 04:31:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-19 04:31:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-19 04:31:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-19 04:31:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-19 04:31:15,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-08-19 04:31:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,236 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-19 04:31:15,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:31:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-19 04:31:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-19 04:31:15,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:31:15,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,239 INFO L82 PathProgramCache]: Analyzing trace with hash 604679234, now seen corresponding path program 1 times [2020-08-19 04:31:15,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236687827] [2020-08-19 04:31:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:15,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236687827] [2020-08-19 04:31:15,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 04:31:15,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356770189] [2020-08-19 04:31:15,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:31:15,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:31:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:31:15,290 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-08-19 04:31:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,307 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-19 04:31:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:31:15,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-08-19 04:31:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,309 INFO L225 Difference]: With dead ends: 18 [2020-08-19 04:31:15,309 INFO L226 Difference]: Without dead ends: 13 [2020-08-19 04:31:15,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:31:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-19 04:31:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-19 04:31:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-19 04:31:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-19 04:31:15,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-19 04:31:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,316 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-19 04:31:15,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:31:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-19 04:31:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-19 04:31:15,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,318 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:31:15,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1600724821, now seen corresponding path program 2 times [2020-08-19 04:31:15,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485790102] [2020-08-19 04:31:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:15,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485790102] [2020-08-19 04:31:15,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:31:15,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558332732] [2020-08-19 04:31:15,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:31:15,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:31:15,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:31:15,376 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-08-19 04:31:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,392 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-19 04:31:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:31:15,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-19 04:31:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,394 INFO L225 Difference]: With dead ends: 19 [2020-08-19 04:31:15,394 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 04:31:15,395 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 [2020-08-19 04:31:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 04:31:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 04:31:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 04:31:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-19 04:31:15,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-19 04:31:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,401 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-19 04:31:15,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:31:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-19 04:31:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 04:31:15,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,402 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:31:15,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1881600350, now seen corresponding path program 3 times [2020-08-19 04:31:15,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882402607] [2020-08-19 04:31:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:15,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882402607] [2020-08-19 04:31:15,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:31:15,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908198681] [2020-08-19 04:31:15,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:31:15,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:31:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:15,476 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-08-19 04:31:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,499 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-19 04:31:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:31:15,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-19 04:31:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,500 INFO L225 Difference]: With dead ends: 20 [2020-08-19 04:31:15,501 INFO L226 Difference]: Without dead ends: 15 [2020-08-19 04:31:15,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:31:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-19 04:31:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-19 04:31:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-19 04:31:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-19 04:31:15,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-19 04:31:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,507 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-19 04:31:15,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:31:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-19 04:31:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 04:31:15,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,509 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:31:15,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1835469045, now seen corresponding path program 4 times [2020-08-19 04:31:15,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179578195] [2020-08-19 04:31:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:15,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179578195] [2020-08-19 04:31:15,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:31:15,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:31:15,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905521492] [2020-08-19 04:31:15,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:31:15,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:31:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:31:15,707 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-08-19 04:31:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,780 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-19 04:31:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:31:15,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-19 04:31:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,782 INFO L225 Difference]: With dead ends: 21 [2020-08-19 04:31:15,782 INFO L226 Difference]: Without dead ends: 16 [2020-08-19 04:31:15,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:31:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-19 04:31:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-19 04:31:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 04:31:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-19 04:31:15,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-19 04:31:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,789 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-19 04:31:15,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:31:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-19 04:31:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 04:31:15,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:31:15,791 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:31:15,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:31:15,791 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:31:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:31:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503298, now seen corresponding path program 5 times [2020-08-19 04:31:15,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:31:15,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875956848] [2020-08-19 04:31:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:31:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:31:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:31:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:31:15,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875956848] [2020-08-19 04:31:15,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:31:15,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 04:31:15,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500974640] [2020-08-19 04:31:15,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:31:15,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:31:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:31:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:31:15,860 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-08-19 04:31:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:31:15,875 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-19 04:31:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:31:15,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-19 04:31:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:31:15,877 INFO L225 Difference]: With dead ends: 16 [2020-08-19 04:31:15,877 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:31:15,878 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 [2020-08-19 04:31:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:31:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:31:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:31:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:31:15,879 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-19 04:31:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:31:15,879 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:31:15,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:31:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:31:15,880 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:31:15,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:31:15,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:31:15,994 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:31:15,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:31:15,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:31:15,995 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:31:15,995 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:31:15,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-08-19 04:31:15,996 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-19 04:31:15,997 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 9))) (and (<= 10 main_~j~0) (<= .cse0 main_~j~0) (<= main_~j~0 .cse0) (<= main_~j~0 10))) (and (<= main_~j~0 6) (<= (+ main_~j~0 3) main_~i~0) (<= 6 main_~j~0)) (let ((.cse1 (+ main_~i~0 6))) (and (<= main_~j~0 .cse1) (<= .cse1 main_~j~0) (<= 9 main_~j~0) (<= main_~j~0 9))) (let ((.cse2 (+ main_~i~0 3))) (and (<= main_~j~0 8) (<= main_~j~0 .cse2) (<= .cse2 main_~j~0) (<= 8 main_~j~0))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 main_~j~0))) [2020-08-19 04:31:15,997 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 20) the Hoare annotation is: (and (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-08-19 04:31:15,997 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-08-19 04:31:15,998 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 04:31:15,998 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 04:31:15,998 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 04:31:15,998 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 04:31:15,998 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 04:31:15,998 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 04:31:16,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:31:16 BoogieIcfgContainer [2020-08-19 04:31:16,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:31:16,021 INFO L168 Benchmark]: Toolchain (without parser) took 1826.73 ms. Allocated memory was 140.5 MB in the beginning and 235.9 MB in the end (delta: 95.4 MB). Free memory was 104.0 MB in the beginning and 199.5 MB in the end (delta: -95.5 MB). Peak memory consumption was 82.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,022 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.36 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,024 INFO L168 Benchmark]: Boogie Preprocessor took 29.98 ms. Allocated memory is still 140.5 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,025 INFO L168 Benchmark]: RCFGBuilder took 333.30 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 171.6 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,026 INFO L168 Benchmark]: TraceAbstraction took 1225.93 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.0 MB in the beginning and 199.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:31:16,030 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.36 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 94.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.98 ms. Allocated memory is still 140.5 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.30 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 171.6 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1225.93 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.0 MB in the beginning and 199.5 MB in the end (delta: -28.6 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((10 <= j && i + 9 <= j) && j <= i + 9) && j <= 10) || ((j <= 6 && j + 3 <= i) && 6 <= j)) || (((j <= i + 6 && i + 6 <= j) && 9 <= j) && j <= 9)) || (((j <= 8 && j <= i + 3) && i + 3 <= j) && 8 <= j)) || (((j <= 7 && 7 <= j) && j <= i) && i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 1 SDslu, 140 SDs, 0 SdLazy, 90 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 89 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2025 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 15/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...