/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:29:46,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:29:46,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:29:46,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:29:46,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:29:46,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:29:46,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:29:46,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:29:46,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:29:46,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:29:46,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:29:46,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:29:46,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:29:46,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:29:46,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:29:46,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:29:46,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:29:46,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:29:46,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:29:46,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:29:46,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:29:46,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:29:46,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:29:46,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:29:46,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:29:46,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:29:46,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:29:46,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:29:46,670 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 [2020-08-21 21:29:46,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:29:46,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:29:46,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:29:46,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:29:46,696 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:29:46,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:29:46,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:29:46,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:29:46,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:29:46,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:29:46,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:29:46,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:29:46,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:29:46,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:29:46,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:29:46,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:29:46,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:29:46,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:29:46,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:29:46,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:29:46,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:29:46,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:29:46,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:29:46,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:29:46,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:29:46,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:29:46,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:29:46,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:29:46,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:29:46,701 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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:29:47,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:29:47,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:29:47,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:29:47,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:29:47,045 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:29:47,045 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-21 21:29:47,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57e637eb9/c7f317b20e2b4b1984edc8543041c840/FLAGfce8be4b8 [2020-08-21 21:29:47,576 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:29:47,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-21 21:29:47,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57e637eb9/c7f317b20e2b4b1984edc8543041c840/FLAGfce8be4b8 [2020-08-21 21:29:48,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57e637eb9/c7f317b20e2b4b1984edc8543041c840 [2020-08-21 21:29:48,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:29:48,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:29:48,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:48,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:29:48,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:29:48,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21715d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48, skipping insertion in model container [2020-08-21 21:29:48,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:29:48,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:29:48,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:48,296 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:29:48,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:29:48,341 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:29:48,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48 WrapperNode [2020-08-21 21:29:48,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:29:48,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:29:48,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:29:48,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:29:48,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (1/1) ... [2020-08-21 21:29:48,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:29:48,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:29:48,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:29:48,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:29:48,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (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 [2020-08-21 21:29:48,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:29:48,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:29:48,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:29:48,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:29:48,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:29:48,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:29:48,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:29:48,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:29:48,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:29:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:29:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:29:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:29:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:29:48,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:29:48,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:29:48,760 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 21:29:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:48 BoogieIcfgContainer [2020-08-21 21:29:48,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:29:48,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:29:48,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:29:48,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:29:48,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:29:48" (1/3) ... [2020-08-21 21:29:48,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612fbd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:48, skipping insertion in model container [2020-08-21 21:29:48,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:29:48" (2/3) ... [2020-08-21 21:29:48,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612fbd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:29:48, skipping insertion in model container [2020-08-21 21:29:48,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:29:48" (3/3) ... [2020-08-21 21:29:48,776 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-21 21:29:48,793 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:29:48,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:29:48,819 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:29:48,849 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:29:48,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:29:48,850 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:29:48,850 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:29:48,850 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:29:48,850 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:29:48,850 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:29:48,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:29:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 21:29:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 21:29:48,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:48,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:48,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-08-21 21:29:48,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:48,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665366006] [2020-08-21 21:29:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:49,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665366006] [2020-08-21 21:29:49,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:49,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:29:49,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869447785] [2020-08-21 21:29:49,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:29:49,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:29:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:49,123 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-21 21:29:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:49,223 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-08-21 21:29:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:29:49,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-21 21:29:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:49,234 INFO L225 Difference]: With dead ends: 42 [2020-08-21 21:29:49,234 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 21:29:49,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:29:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 21:29:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 21:29:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 21:29:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 21:29:49,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-08-21 21:29:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:49,277 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 21:29:49,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:29:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 21:29:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 21:29:49,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:49,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:49,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:29:49,279 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:49,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-08-21 21:29:49,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:49,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330461946] [2020-08-21 21:29:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:49,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330461946] [2020-08-21 21:29:49,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:49,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:29:49,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612671946] [2020-08-21 21:29:49,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:29:49,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:29:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:29:49,373 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-21 21:29:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:49,447 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-21 21:29:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:29:49,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 21:29:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:49,451 INFO L225 Difference]: With dead ends: 35 [2020-08-21 21:29:49,452 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 21:29:49,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:29:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 21:29:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-21 21:29:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 21:29:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-21 21:29:49,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-08-21 21:29:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:49,462 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-21 21:29:49,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:29:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-21 21:29:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 21:29:49,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:49,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:49,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:29:49,465 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-08-21 21:29:49,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:49,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409329494] [2020-08-21 21:29:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:49,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409329494] [2020-08-21 21:29:49,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:49,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:29:49,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307634531] [2020-08-21 21:29:49,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:29:49,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:29:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:49,540 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-21 21:29:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:49,620 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-08-21 21:29:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:29:49,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 21:29:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:49,622 INFO L225 Difference]: With dead ends: 45 [2020-08-21 21:29:49,622 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 21:29:49,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:29:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 21:29:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-21 21:29:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 21:29:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-21 21:29:49,631 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-21 21:29:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:49,632 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-21 21:29:49,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:29:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-21 21:29:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 21:29:49,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:49,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:49,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:29:49,634 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-08-21 21:29:49,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:49,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778436178] [2020-08-21 21:29:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:49,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778436178] [2020-08-21 21:29:49,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:49,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:29:49,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163100249] [2020-08-21 21:29:49,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:49,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:49,758 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-21 21:29:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:49,867 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-21 21:29:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:29:49,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 21:29:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:49,869 INFO L225 Difference]: With dead ends: 56 [2020-08-21 21:29:49,869 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 21:29:49,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 21:29:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-08-21 21:29:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 21:29:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-21 21:29:49,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-21 21:29:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:49,880 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-21 21:29:49,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-21 21:29:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:29:49,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:49,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:49,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:29:49,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:49,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-08-21 21:29:49,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:49,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686895512] [2020-08-21 21:29:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:29:50,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686895512] [2020-08-21 21:29:50,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:50,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:50,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856677469] [2020-08-21 21:29:50,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:50,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:50,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:50,039 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-08-21 21:29:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:50,161 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-21 21:29:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:50,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 21:29:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:50,165 INFO L225 Difference]: With dead ends: 67 [2020-08-21 21:29:50,165 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 21:29:50,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 21:29:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 21:29:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 21:29:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 21:29:50,174 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-08-21 21:29:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:50,175 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 21:29:50,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 21:29:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:29:50,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:50,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:50,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:29:50,177 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-08-21 21:29:50,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:50,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114048576] [2020-08-21 21:29:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 21:29:50,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114048576] [2020-08-21 21:29:50,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:50,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:29:50,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622713095] [2020-08-21 21:29:50,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:29:50,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:29:50,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:29:50,259 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-08-21 21:29:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:50,343 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-08-21 21:29:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:29:50,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 21:29:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:50,345 INFO L225 Difference]: With dead ends: 45 [2020-08-21 21:29:50,346 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 21:29:50,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:29:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 21:29:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-21 21:29:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 21:29:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 21:29:50,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-08-21 21:29:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 21:29:50,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:29:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 21:29:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:29:50,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:50,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:50,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:29:50,356 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-08-21 21:29:50,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:50,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433504864] [2020-08-21 21:29:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:50,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433504864] [2020-08-21 21:29:50,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:50,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:29:50,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074362303] [2020-08-21 21:29:50,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:29:50,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:29:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:29:50,458 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-08-21 21:29:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:50,563 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-08-21 21:29:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:29:50,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-21 21:29:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:50,565 INFO L225 Difference]: With dead ends: 77 [2020-08-21 21:29:50,565 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 21:29:50,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:29:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 21:29:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-21 21:29:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 21:29:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-21 21:29:50,574 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-08-21 21:29:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:50,574 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-21 21:29:50,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:29:50,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-21 21:29:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:29:50,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:50,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:50,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:29:50,576 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-08-21 21:29:50,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:50,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477347952] [2020-08-21 21:29:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:50,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477347952] [2020-08-21 21:29:50,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:50,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:29:50,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290177588] [2020-08-21 21:29:50,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:29:50,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:29:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:50,678 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-08-21 21:29:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:50,783 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 21:29:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:29:50,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-21 21:29:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:50,785 INFO L225 Difference]: With dead ends: 88 [2020-08-21 21:29:50,785 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 21:29:50,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 21:29:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-08-21 21:29:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 21:29:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-08-21 21:29:50,794 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-08-21 21:29:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:50,795 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-08-21 21:29:50,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:29:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-08-21 21:29:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 21:29:50,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:50,796 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:50,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:29:50,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-08-21 21:29:50,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:50,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107486628] [2020-08-21 21:29:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:50,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107486628] [2020-08-21 21:29:50,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:50,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:29:50,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587723192] [2020-08-21 21:29:50,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:29:50,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:29:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:50,924 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-08-21 21:29:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:51,060 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-08-21 21:29:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:29:51,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-21 21:29:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:51,062 INFO L225 Difference]: With dead ends: 99 [2020-08-21 21:29:51,063 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 21:29:51,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:29:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 21:29:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-08-21 21:29:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 21:29:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-08-21 21:29:51,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-08-21 21:29:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:51,079 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-08-21 21:29:51,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:29:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-08-21 21:29:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 21:29:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:51,087 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:51,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:29:51,088 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:51,088 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-08-21 21:29:51,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:51,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869456360] [2020-08-21 21:29:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:51,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869456360] [2020-08-21 21:29:51,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:51,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 21:29:51,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245535184] [2020-08-21 21:29:51,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:29:51,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:29:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:51,249 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-08-21 21:29:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:51,371 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-08-21 21:29:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:29:51,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-21 21:29:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:51,374 INFO L225 Difference]: With dead ends: 110 [2020-08-21 21:29:51,375 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 21:29:51,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:29:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 21:29:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-08-21 21:29:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 21:29:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-08-21 21:29:51,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-08-21 21:29:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:51,389 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-08-21 21:29:51,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:29:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-08-21 21:29:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 21:29:51,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:51,391 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:51,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:29:51,392 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-08-21 21:29:51,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:51,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624158623] [2020-08-21 21:29:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:51,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624158623] [2020-08-21 21:29:51,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:51,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:29:51,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307733] [2020-08-21 21:29:51,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:29:51,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:29:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:29:51,543 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-08-21 21:29:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:51,673 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-08-21 21:29:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:29:51,674 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-21 21:29:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:51,675 INFO L225 Difference]: With dead ends: 121 [2020-08-21 21:29:51,675 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 21:29:51,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:29:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 21:29:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-21 21:29:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:29:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 21:29:51,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-08-21 21:29:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:51,686 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 21:29:51,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:29:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 21:29:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 21:29:51,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:51,688 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:51,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:29:51,688 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-08-21 21:29:51,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545537751] [2020-08-21 21:29:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:51,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545537751] [2020-08-21 21:29:51,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:51,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:29:51,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592761231] [2020-08-21 21:29:51,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:29:51,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:51,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:29:51,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:29:51,834 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-08-21 21:29:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:52,004 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-08-21 21:29:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:29:52,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-21 21:29:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:52,006 INFO L225 Difference]: With dead ends: 132 [2020-08-21 21:29:52,006 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 21:29:52,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:29:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 21:29:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-08-21 21:29:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 21:29:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-21 21:29:52,013 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-08-21 21:29:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:52,014 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-21 21:29:52,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:29:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-21 21:29:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 21:29:52,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:52,015 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:52,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:29:52,015 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-08-21 21:29:52,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:52,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853608320] [2020-08-21 21:29:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:52,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853608320] [2020-08-21 21:29:52,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:52,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:29:52,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698155315] [2020-08-21 21:29:52,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:29:52,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:52,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:29:52,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:29:52,164 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-08-21 21:29:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:52,323 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-08-21 21:29:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:29:52,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-21 21:29:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:52,324 INFO L225 Difference]: With dead ends: 143 [2020-08-21 21:29:52,324 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 21:29:52,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:29:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 21:29:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-08-21 21:29:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 21:29:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-08-21 21:29:52,332 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-08-21 21:29:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:52,332 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-08-21 21:29:52,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:29:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-08-21 21:29:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 21:29:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:52,333 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:52,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:29:52,334 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-08-21 21:29:52,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228125878] [2020-08-21 21:29:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:29:52,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228125878] [2020-08-21 21:29:52,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:52,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 21:29:52,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202213386] [2020-08-21 21:29:52,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 21:29:52,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 21:29:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:29:52,509 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-08-21 21:29:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:52,674 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-08-21 21:29:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:29:52,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-21 21:29:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:52,676 INFO L225 Difference]: With dead ends: 154 [2020-08-21 21:29:52,676 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 21:29:52,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:29:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 21:29:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-08-21 21:29:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 21:29:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-08-21 21:29:52,683 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-08-21 21:29:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:52,684 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-08-21 21:29:52,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 21:29:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-08-21 21:29:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 21:29:52,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:52,685 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:52,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:29:52,685 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-08-21 21:29:52,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:52,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291073649] [2020-08-21 21:29:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-21 21:29:52,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291073649] [2020-08-21 21:29:52,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:29:52,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:29:52,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17442327] [2020-08-21 21:29:52,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:52,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:52,770 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-08-21 21:29:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:52,868 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-08-21 21:29:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:52,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 21:29:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:52,870 INFO L225 Difference]: With dead ends: 93 [2020-08-21 21:29:52,871 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 21:29:52,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 21:29:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-21 21:29:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 21:29:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-08-21 21:29:52,878 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-08-21 21:29:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:52,878 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-08-21 21:29:52,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-08-21 21:29:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 21:29:52,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:29:52,880 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:29:52,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:29:52,880 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:29:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:29:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-08-21 21:29:52,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:29:52,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164452372] [2020-08-21 21:29:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:29:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:29:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:29:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-08-21 21:29:52,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164452372] [2020-08-21 21:29:52,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:29:52,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:29:52,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695470290] [2020-08-21 21:29:52,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:29:52,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:29:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:29:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:29:52,989 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-08-21 21:29:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:29:53,063 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-08-21 21:29:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:29:53,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-08-21 21:29:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:29:53,064 INFO L225 Difference]: With dead ends: 88 [2020-08-21 21:29:53,064 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:29:53,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:29:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:29:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:29:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:29:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:29:53,066 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-08-21 21:29:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:29:53,066 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:29:53,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:29:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:29:53,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:29:53,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:29:53,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:29:53,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:53,158 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 21:29:53,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:53,158 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:29:53,159 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:29:53,159 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:29:53,159 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:29:53,159 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-21 21:29:53,159 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-08-21 21:29:53,159 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-08-21 21:29:53,159 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-21 21:29:53,160 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-21 21:29:53,160 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-21 21:29:53,160 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-08-21 21:29:53,160 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-08-21 21:29:53,160 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-08-21 21:29:53,160 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 21:29:53,160 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 21:29:53,161 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-21 21:29:53,161 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 21:29:53,161 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 21:29:53,161 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 21:29:53,161 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 21:29:53,161 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 21:29:53,162 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 21:29:53,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:29:53 BoogieIcfgContainer [2020-08-21 21:29:53,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:29:53,184 INFO L168 Benchmark]: Toolchain (without parser) took 5158.55 ms. Allocated memory was 138.9 MB in the beginning and 289.4 MB in the end (delta: 150.5 MB). Free memory was 102.2 MB in the beginning and 236.9 MB in the end (delta: -134.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,185 INFO L168 Benchmark]: CDTParser took 0.29 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.26 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,187 INFO L168 Benchmark]: Boogie Preprocessor took 118.59 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 178.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,187 INFO L168 Benchmark]: RCFGBuilder took 305.20 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 163.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,188 INFO L168 Benchmark]: TraceAbstraction took 4412.97 ms. Allocated memory was 200.8 MB in the beginning and 289.4 MB in the end (delta: 88.6 MB). Free memory was 163.1 MB in the beginning and 236.9 MB in the end (delta: -73.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:29:53,192 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.26 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.59 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.2 MB in the beginning and 178.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.20 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 163.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4412.97 ms. Allocated memory was 200.8 MB in the beginning and 289.4 MB in the end (delta: 88.6 MB). Free memory was 163.1 MB in the beginning and 236.9 MB in the end (delta: -73.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...