/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:39:53,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:39:53,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:39:53,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:39:53,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:39:53,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:39:53,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:39:53,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:39:53,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:39:53,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:39:53,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:39:53,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:39:53,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:39:53,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:39:53,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:39:53,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:39:53,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:39:53,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:39:53,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:39:53,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:39:53,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:39:53,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:39:53,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:39:53,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:39:53,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:39:53,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:39:53,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:39:53,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:39:53,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:39:53,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 04:39:53,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:39:53,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:39:53,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:39:53,805 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 [2020-08-22 04:39:53,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:39:53,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:39:53,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:39:53,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:39:53,830 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:39:53,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:39:53,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:39:53,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:39:53,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:39:53,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:39:53,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:39:53,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:39:53,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:39:53,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:39:53,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:39:53,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:39:53,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:39:53,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:39:53,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:39:53,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:39:53,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:39:53,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:39:53,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:39:53,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:39:53,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:39:53,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:39:53,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:39:53,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:39:53,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:39:53,835 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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:39:54,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:39:54,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:39:54,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:39:54,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:39:54,182 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:39:54,183 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 04:39:54,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af9f27e25/4d0e385ce2c84b8eadf3e6829519bcc1/FLAGa22b4abc3 [2020-08-22 04:39:54,745 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:39:54,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-22 04:39:54,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af9f27e25/4d0e385ce2c84b8eadf3e6829519bcc1/FLAGa22b4abc3 [2020-08-22 04:39:55,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af9f27e25/4d0e385ce2c84b8eadf3e6829519bcc1 [2020-08-22 04:39:55,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:39:55,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:39:55,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:55,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:39:55,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:39:55,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1dceb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55, skipping insertion in model container [2020-08-22 04:39:55,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:39:55,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:39:55,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:55,461 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:39:55,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:55,500 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:39:55,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55 WrapperNode [2020-08-22 04:39:55,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:55,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:39:55,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:39:55,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:39:55,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (1/1) ... [2020-08-22 04:39:55,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:39:55,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:39:55,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:39:55,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:39:55,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (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 [2020-08-22 04:39:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:39:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:39:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:39:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:39:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:39:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:39:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:39:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:39:55,998 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:39:55,998 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 04:39:56,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:56 BoogieIcfgContainer [2020-08-22 04:39:56,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:39:56,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:39:56,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:39:56,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:39:56,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:39:55" (1/3) ... [2020-08-22 04:39:56,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:56, skipping insertion in model container [2020-08-22 04:39:56,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:55" (2/3) ... [2020-08-22 04:39:56,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:56, skipping insertion in model container [2020-08-22 04:39:56,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:56" (3/3) ... [2020-08-22 04:39:56,017 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-22 04:39:56,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:39:56,044 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:39:56,063 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:39:56,115 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:39:56,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:39:56,116 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:39:56,116 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:39:56,116 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:39:56,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:39:56,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:39:56,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:39:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-22 04:39:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:39:56,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:56,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:56,149 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-22 04:39:56,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:56,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564093158] [2020-08-22 04:39:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:56,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564093158] [2020-08-22 04:39:56,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:56,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:56,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172537291] [2020-08-22 04:39:56,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:56,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,442 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-22 04:39:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:56,499 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-22 04:39:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:56,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:39:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:56,513 INFO L225 Difference]: With dead ends: 87 [2020-08-22 04:39:56,513 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 04:39:56,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 04:39:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-22 04:39:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 04:39:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-22 04:39:56,568 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-22 04:39:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:56,569 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-22 04:39:56,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-22 04:39:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:39:56,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:56,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:56,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:39:56,571 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-22 04:39:56,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:56,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556632864] [2020-08-22 04:39:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:56,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556632864] [2020-08-22 04:39:56,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:56,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:56,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069832352] [2020-08-22 04:39:56,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:56,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:56,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:56,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,639 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-22 04:39:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:56,684 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-22 04:39:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:56,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:39:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:56,687 INFO L225 Difference]: With dead ends: 117 [2020-08-22 04:39:56,687 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 04:39:56,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 04:39:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-22 04:39:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 04:39:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-22 04:39:56,702 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-22 04:39:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:56,702 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-22 04:39:56,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-22 04:39:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:39:56,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:56,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:56,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:39:56,705 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-22 04:39:56,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:56,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978939014] [2020-08-22 04:39:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:56,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978939014] [2020-08-22 04:39:56,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:56,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:56,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417048328] [2020-08-22 04:39:56,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:56,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:56,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,766 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-22 04:39:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:56,788 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-22 04:39:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:56,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:39:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:56,791 INFO L225 Difference]: With dead ends: 108 [2020-08-22 04:39:56,791 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 04:39:56,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 04:39:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-22 04:39:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 04:39:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-22 04:39:56,805 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-22 04:39:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:56,806 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-22 04:39:56,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-22 04:39:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:39:56,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:56,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:56,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:39:56,811 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-22 04:39:56,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:56,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020997045] [2020-08-22 04:39:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:56,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020997045] [2020-08-22 04:39:56,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:56,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:56,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703941759] [2020-08-22 04:39:56,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:56,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,908 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-22 04:39:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:56,929 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-22 04:39:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:56,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:39:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:56,931 INFO L225 Difference]: With dead ends: 136 [2020-08-22 04:39:56,932 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 04:39:56,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 04:39:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-22 04:39:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 04:39:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-22 04:39:56,945 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-22 04:39:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:56,946 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-22 04:39:56,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-22 04:39:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:39:56,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:56,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:56,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:39:56,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-22 04:39:56,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:56,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904092184] [2020-08-22 04:39:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:56,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904092184] [2020-08-22 04:39:56,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:56,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:56,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933260487] [2020-08-22 04:39:56,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:56,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:56,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:56,992 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-22 04:39:57,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,017 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-22 04:39:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:39:57,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,020 INFO L225 Difference]: With dead ends: 224 [2020-08-22 04:39:57,020 INFO L226 Difference]: Without dead ends: 136 [2020-08-22 04:39:57,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-22 04:39:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-22 04:39:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 04:39:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-22 04:39:57,035 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-22 04:39:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,036 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-22 04:39:57,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-22 04:39:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:39:57,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:39:57,039 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-22 04:39:57,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235908702] [2020-08-22 04:39:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235908702] [2020-08-22 04:39:57,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911453051] [2020-08-22 04:39:57,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,089 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-22 04:39:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,117 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-22 04:39:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:39:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,120 INFO L225 Difference]: With dead ends: 201 [2020-08-22 04:39:57,120 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 04:39:57,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 04:39:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-22 04:39:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 04:39:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-22 04:39:57,134 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-22 04:39:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,135 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-22 04:39:57,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-22 04:39:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:39:57,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:39:57,138 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-22 04:39:57,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588211304] [2020-08-22 04:39:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588211304] [2020-08-22 04:39:57,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290514649] [2020-08-22 04:39:57,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,198 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-22 04:39:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,223 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-22 04:39:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:39:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,226 INFO L225 Difference]: With dead ends: 252 [2020-08-22 04:39:57,226 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 04:39:57,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 04:39:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-22 04:39:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 04:39:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-22 04:39:57,241 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-22 04:39:57,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,242 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-22 04:39:57,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-22 04:39:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:39:57,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:39:57,244 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-22 04:39:57,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951748938] [2020-08-22 04:39:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951748938] [2020-08-22 04:39:57,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544143535] [2020-08-22 04:39:57,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,281 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-22 04:39:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,302 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-22 04:39:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:39:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,305 INFO L225 Difference]: With dead ends: 432 [2020-08-22 04:39:57,305 INFO L226 Difference]: Without dead ends: 258 [2020-08-22 04:39:57,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-22 04:39:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-22 04:39:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 04:39:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-22 04:39:57,327 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-22 04:39:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,327 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-22 04:39:57,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-22 04:39:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:39:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:39:57,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-22 04:39:57,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332744959] [2020-08-22 04:39:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332744959] [2020-08-22 04:39:57,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918285104] [2020-08-22 04:39:57,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,377 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-22 04:39:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,402 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-22 04:39:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:39:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,405 INFO L225 Difference]: With dead ends: 384 [2020-08-22 04:39:57,405 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 04:39:57,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 04:39:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-22 04:39:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 04:39:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-22 04:39:57,418 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-22 04:39:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,419 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-22 04:39:57,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-22 04:39:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:39:57,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:39:57,421 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-22 04:39:57,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117142258] [2020-08-22 04:39:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117142258] [2020-08-22 04:39:57,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666686368] [2020-08-22 04:39:57,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,450 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-22 04:39:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,472 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-22 04:39:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:39:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,476 INFO L225 Difference]: With dead ends: 476 [2020-08-22 04:39:57,476 INFO L226 Difference]: Without dead ends: 474 [2020-08-22 04:39:57,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-22 04:39:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-22 04:39:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 04:39:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-22 04:39:57,491 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-22 04:39:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,491 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-22 04:39:57,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-22 04:39:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:39:57,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:39:57,495 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-22 04:39:57,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883838107] [2020-08-22 04:39:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883838107] [2020-08-22 04:39:57,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863972888] [2020-08-22 04:39:57,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,521 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-22 04:39:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,569 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-22 04:39:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:39:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,574 INFO L225 Difference]: With dead ends: 844 [2020-08-22 04:39:57,574 INFO L226 Difference]: Without dead ends: 498 [2020-08-22 04:39:57,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-22 04:39:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-22 04:39:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-22 04:39:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-22 04:39:57,605 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-22 04:39:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,606 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-22 04:39:57,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-22 04:39:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:39:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:39:57,611 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-22 04:39:57,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418055881] [2020-08-22 04:39:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418055881] [2020-08-22 04:39:57,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457158420] [2020-08-22 04:39:57,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,665 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-22 04:39:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,692 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-22 04:39:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:39:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,696 INFO L225 Difference]: With dead ends: 744 [2020-08-22 04:39:57,696 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 04:39:57,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 04:39:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-22 04:39:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-22 04:39:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-22 04:39:57,715 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-22 04:39:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,715 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-22 04:39:57,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-22 04:39:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:39:57,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:39:57,721 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-22 04:39:57,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524179304] [2020-08-22 04:39:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524179304] [2020-08-22 04:39:57,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113297223] [2020-08-22 04:39:57,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,770 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-22 04:39:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,804 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-22 04:39:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:39:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,810 INFO L225 Difference]: With dead ends: 908 [2020-08-22 04:39:57,810 INFO L226 Difference]: Without dead ends: 906 [2020-08-22 04:39:57,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-22 04:39:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-22 04:39:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-22 04:39:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-22 04:39:57,834 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-22 04:39:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,835 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-22 04:39:57,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-22 04:39:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:39:57,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:39:57,837 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-22 04:39:57,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517303661] [2020-08-22 04:39:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517303661] [2020-08-22 04:39:57,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505953671] [2020-08-22 04:39:57,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,869 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-22 04:39:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:57,901 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-22 04:39:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:57,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:39:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:57,908 INFO L225 Difference]: With dead ends: 1660 [2020-08-22 04:39:57,908 INFO L226 Difference]: Without dead ends: 970 [2020-08-22 04:39:57,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-22 04:39:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-22 04:39:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-22 04:39:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-22 04:39:57,949 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-22 04:39:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:57,950 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-22 04:39:57,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-22 04:39:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:39:57,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:57,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:57,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:39:57,954 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-22 04:39:57,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:57,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043110637] [2020-08-22 04:39:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:57,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043110637] [2020-08-22 04:39:57,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:57,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:57,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447183645] [2020-08-22 04:39:57,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:57,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:57,989 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-22 04:39:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,032 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-22 04:39:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:39:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,039 INFO L225 Difference]: With dead ends: 1452 [2020-08-22 04:39:58,039 INFO L226 Difference]: Without dead ends: 986 [2020-08-22 04:39:58,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-22 04:39:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-22 04:39:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-22 04:39:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-22 04:39:58,114 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-22 04:39:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:58,114 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-22 04:39:58,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-22 04:39:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:39:58,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:58,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:58,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:39:58,117 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-22 04:39:58,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:58,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808651798] [2020-08-22 04:39:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:58,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808651798] [2020-08-22 04:39:58,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:58,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:58,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505525184] [2020-08-22 04:39:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:58,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,148 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-22 04:39:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,196 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-22 04:39:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:39:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,208 INFO L225 Difference]: With dead ends: 1740 [2020-08-22 04:39:58,208 INFO L226 Difference]: Without dead ends: 1738 [2020-08-22 04:39:58,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-22 04:39:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-22 04:39:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-22 04:39:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-22 04:39:58,266 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-22 04:39:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:58,267 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-22 04:39:58,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-22 04:39:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:39:58,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:58,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:58,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:39:58,272 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-22 04:39:58,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:58,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492910739] [2020-08-22 04:39:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:58,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492910739] [2020-08-22 04:39:58,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:58,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:58,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650419660] [2020-08-22 04:39:58,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:58,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,301 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-22 04:39:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,367 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-22 04:39:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:39:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,379 INFO L225 Difference]: With dead ends: 3276 [2020-08-22 04:39:58,379 INFO L226 Difference]: Without dead ends: 1898 [2020-08-22 04:39:58,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-22 04:39:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-22 04:39:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-22 04:39:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-22 04:39:58,471 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-22 04:39:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:58,471 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-22 04:39:58,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-22 04:39:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:39:58,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:58,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:58,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:39:58,477 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-22 04:39:58,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:58,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668824715] [2020-08-22 04:39:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:58,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668824715] [2020-08-22 04:39:58,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:58,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:58,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357594771] [2020-08-22 04:39:58,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:58,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,508 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-22 04:39:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,565 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-22 04:39:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:39:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,579 INFO L225 Difference]: With dead ends: 2844 [2020-08-22 04:39:58,580 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 04:39:58,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 04:39:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-22 04:39:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-22 04:39:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-22 04:39:58,650 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-22 04:39:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:58,651 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-22 04:39:58,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-22 04:39:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:39:58,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:58,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:58,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:39:58,655 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:58,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-22 04:39:58,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:58,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771556169] [2020-08-22 04:39:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:58,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771556169] [2020-08-22 04:39:58,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:58,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:58,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380028743] [2020-08-22 04:39:58,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:58,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,678 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-22 04:39:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,737 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-22 04:39:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:39:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,754 INFO L225 Difference]: With dead ends: 3340 [2020-08-22 04:39:58,754 INFO L226 Difference]: Without dead ends: 3338 [2020-08-22 04:39:58,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-22 04:39:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-22 04:39:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-22 04:39:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-22 04:39:58,871 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-22 04:39:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:58,871 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-22 04:39:58,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-22 04:39:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:39:58,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:58,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:58,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:39:58,877 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-22 04:39:58,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:58,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786563781] [2020-08-22 04:39:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:58,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786563781] [2020-08-22 04:39:58,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:58,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:58,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611201478] [2020-08-22 04:39:58,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:58,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:58,900 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-22 04:39:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:58,974 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-22 04:39:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:58,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 04:39:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:58,992 INFO L225 Difference]: With dead ends: 6476 [2020-08-22 04:39:58,992 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 04:39:58,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 04:39:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-22 04:39:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-22 04:39:59,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-22 04:39:59,109 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-22 04:39:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:59,110 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-22 04:39:59,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-22 04:39:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:39:59,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:59,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:59,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:39:59,116 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-22 04:39:59,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:59,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715163404] [2020-08-22 04:39:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:59,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715163404] [2020-08-22 04:39:59,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:59,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:59,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334628079] [2020-08-22 04:39:59,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:59,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:59,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,140 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-22 04:39:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:59,203 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-22 04:39:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:59,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 04:39:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:59,221 INFO L225 Difference]: With dead ends: 5580 [2020-08-22 04:39:59,222 INFO L226 Difference]: Without dead ends: 3786 [2020-08-22 04:39:59,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-22 04:39:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-22 04:39:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-22 04:39:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-22 04:39:59,359 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-22 04:39:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:59,360 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-22 04:39:59,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-22 04:39:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:39:59,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:59,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:59,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:39:59,365 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:59,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-22 04:39:59,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:59,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181365416] [2020-08-22 04:39:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:59,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181365416] [2020-08-22 04:39:59,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:59,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:59,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729763995] [2020-08-22 04:39:59,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:59,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,387 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-22 04:39:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:59,487 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-22 04:39:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:59,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 04:39:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:59,522 INFO L225 Difference]: With dead ends: 10956 [2020-08-22 04:39:59,525 INFO L226 Difference]: Without dead ends: 7306 [2020-08-22 04:39:59,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-22 04:39:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-22 04:39:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 04:39:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-22 04:39:59,750 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-22 04:39:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:59,751 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-22 04:39:59,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:39:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-22 04:39:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:39:59,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:59,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:59,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:39:59,761 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-22 04:39:59,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:59,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876185937] [2020-08-22 04:39:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:59,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876185937] [2020-08-22 04:39:59,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:59,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:39:59,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441135545] [2020-08-22 04:39:59,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:39:59,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:59,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:39:59,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,803 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-22 04:39:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:59,937 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-22 04:39:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:39:59,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 04:39:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:59,968 INFO L225 Difference]: With dead ends: 8076 [2020-08-22 04:39:59,968 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 04:39:59,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:39:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 04:40:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-22 04:40:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-22 04:40:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-22 04:40:00,215 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-22 04:40:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:00,215 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-22 04:40:00,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-22 04:40:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:40:00,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:00,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:00,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:40:00,224 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-22 04:40:00,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:00,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683318805] [2020-08-22 04:40:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:00,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683318805] [2020-08-22 04:40:00,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:00,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:00,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332758308] [2020-08-22 04:40:00,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:00,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:00,246 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-22 04:40:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:00,422 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-22 04:40:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:00,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 04:40:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:00,449 INFO L225 Difference]: With dead ends: 12172 [2020-08-22 04:40:00,450 INFO L226 Difference]: Without dead ends: 12170 [2020-08-22 04:40:00,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-22 04:40:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-22 04:40:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-22 04:40:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-22 04:40:00,824 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-22 04:40:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:00,824 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-22 04:40:00,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-22 04:40:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:40:00,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:00,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:00,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 04:40:00,842 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-22 04:40:00,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:00,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083686988] [2020-08-22 04:40:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:00,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:00,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083686988] [2020-08-22 04:40:00,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:00,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:00,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945890490] [2020-08-22 04:40:00,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:00,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:00,889 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-22 04:40:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:01,096 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-22 04:40:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:01,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 04:40:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:01,125 INFO L225 Difference]: With dead ends: 25228 [2020-08-22 04:40:01,125 INFO L226 Difference]: Without dead ends: 14218 [2020-08-22 04:40:01,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-22 04:40:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-22 04:40:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-22 04:40:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-22 04:40:01,975 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-22 04:40:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:01,975 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-22 04:40:01,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-22 04:40:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 04:40:01,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:01,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:01,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 04:40:01,993 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-22 04:40:01,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:01,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389378955] [2020-08-22 04:40:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:02,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:02,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389378955] [2020-08-22 04:40:02,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:02,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:02,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508539746] [2020-08-22 04:40:02,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:02,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:02,014 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-22 04:40:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:02,176 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-22 04:40:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:02,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 04:40:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:02,201 INFO L225 Difference]: With dead ends: 21516 [2020-08-22 04:40:02,201 INFO L226 Difference]: Without dead ends: 14602 [2020-08-22 04:40:02,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-22 04:40:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-22 04:40:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-22 04:40:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-22 04:40:02,593 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-22 04:40:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:02,593 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-22 04:40:02,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-22 04:40:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 04:40:02,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:02,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:02,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 04:40:02,611 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-22 04:40:02,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:02,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38800474] [2020-08-22 04:40:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:02,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:02,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38800474] [2020-08-22 04:40:02,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:02,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:02,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738213251] [2020-08-22 04:40:02,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:02,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:02,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:02,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:02,639 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-22 04:40:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:02,883 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-22 04:40:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:02,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 04:40:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:02,923 INFO L225 Difference]: With dead ends: 23562 [2020-08-22 04:40:02,924 INFO L226 Difference]: Without dead ends: 23560 [2020-08-22 04:40:02,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-22 04:40:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-22 04:40:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-22 04:40:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-22 04:40:03,534 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-22 04:40:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:03,534 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-22 04:40:03,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-22 04:40:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 04:40:03,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:03,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:03,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 04:40:03,571 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-22 04:40:03,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:03,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377210068] [2020-08-22 04:40:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:03,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:03,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377210068] [2020-08-22 04:40:03,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:03,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:03,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329968074] [2020-08-22 04:40:03,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:03,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:03,604 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-22 04:40:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:03,939 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-22 04:40:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:03,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 04:40:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:03,940 INFO L225 Difference]: With dead ends: 50184 [2020-08-22 04:40:03,940 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:40:04,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:40:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:40:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:40:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:40:04,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-22 04:40:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:04,008 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:40:04,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:40:04,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:40:04,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 04:40:04,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:40:04,046 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:40:04,046 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:04,046 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:04,046 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:40:04,046 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:40:04,046 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-22 04:40:04,047 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-22 04:40:04,050 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-22 04:40:04,051 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-22 04:40:04,051 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-22 04:40:04,051 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-22 04:40:04,051 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-22 04:40:04,051 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,051 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,051 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-22 04:40:04,052 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-22 04:40:04,053 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-22 04:40:04,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:40:04 BoogieIcfgContainer [2020-08-22 04:40:04,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:40:04,076 INFO L168 Benchmark]: Toolchain (without parser) took 8950.22 ms. Allocated memory was 137.9 MB in the beginning and 568.9 MB in the end (delta: 431.0 MB). Free memory was 100.3 MB in the beginning and 214.8 MB in the end (delta: -114.6 MB). Peak memory consumption was 316.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:04,079 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:40:04,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.00 ms. Allocated memory is still 137.9 MB. Free memory was 100.1 MB in the beginning and 89.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:04,083 INFO L168 Benchmark]: Boogie Preprocessor took 112.61 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 89.3 MB in the beginning and 176.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:04,084 INFO L168 Benchmark]: RCFGBuilder took 389.29 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 157.5 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:04,085 INFO L168 Benchmark]: TraceAbstraction took 8066.19 ms. Allocated memory was 199.2 MB in the beginning and 568.9 MB in the end (delta: 369.6 MB). Free memory was 156.8 MB in the beginning and 214.8 MB in the end (delta: -58.0 MB). Peak memory consumption was 311.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:04,092 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 375.00 ms. Allocated memory is still 137.9 MB. Free memory was 100.1 MB in the beginning and 89.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.61 ms. Allocated memory was 137.9 MB in the beginning and 199.2 MB in the end (delta: 61.3 MB). Free memory was 89.3 MB in the beginning and 176.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 389.29 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 157.5 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8066.19 ms. Allocated memory was 199.2 MB in the beginning and 568.9 MB in the end (delta: 369.6 MB). Free memory was 156.8 MB in the beginning and 214.8 MB in the end (delta: -58.0 MB). Peak memory consumption was 311.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.8s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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...