/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:45:25,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:45:25,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:45:25,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:45:25,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:45:25,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:45:25,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:45:25,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:45:25,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:45:25,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:45:25,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:45:25,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:45:25,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:45:25,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:45:25,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:45:25,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:45:25,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:45:25,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:45:25,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:45:25,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:45:25,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:45:25,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:45:25,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:45:25,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:45:25,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:45:25,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:45:25,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:45:25,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:45:25,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:45:25,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:45:25,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:45:25,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:45:25,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:45:25,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:45:25,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:45:25,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:45:25,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:45:25,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:45:25,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:45:25,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:45:25,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:45:25,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:45:25,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:45:25,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:45:25,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:45:25,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:45:25,181 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:45:25,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:45:25,181 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:45:25,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:45:25,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:45:25,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:45:25,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:45:25,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:45:25,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:45:25,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:45:25,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:45:25,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:45:25,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:45:25,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:45:25,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:45:25,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:45:25,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:45:25,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:45:25,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:45:25,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:45:25,185 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:45:25,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:45:25,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:45:25,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:45:25,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:45:25,556 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:45:25,557 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-21 23:45:25,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f87477223/6820bb2296404a0abde79c4cf9eacd7a/FLAG71bfd21f0 [2020-08-21 23:45:26,041 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:45:26,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-21 23:45:26,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f87477223/6820bb2296404a0abde79c4cf9eacd7a/FLAG71bfd21f0 [2020-08-21 23:45:26,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f87477223/6820bb2296404a0abde79c4cf9eacd7a [2020-08-21 23:45:26,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:45:26,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:45:26,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:26,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:45:26,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:45:26,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11967da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26, skipping insertion in model container [2020-08-21 23:45:26,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:45:26,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:45:26,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:26,293 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:45:26,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:26,322 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:45:26,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26 WrapperNode [2020-08-21 23:45:26,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:26,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:45:26,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:45:26,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:45:26,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... [2020-08-21 23:45:26,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:45:26,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:45:26,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:45:26,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:45:26,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:45:26,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:45:26,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:45:26,484 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-21 23:45:26,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:45:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:45:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:45:26,484 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-21 23:45:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:45:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:45:26,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:45:26,753 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:45:26,754 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:45:26,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:26 BoogieIcfgContainer [2020-08-21 23:45:26,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:45:26,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:45:26,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:45:26,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:45:26,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:45:26" (1/3) ... [2020-08-21 23:45:26,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23efb93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:26, skipping insertion in model container [2020-08-21 23:45:26,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:26" (2/3) ... [2020-08-21 23:45:26,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23efb93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:26, skipping insertion in model container [2020-08-21 23:45:26,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:26" (3/3) ... [2020-08-21 23:45:26,765 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-21 23:45:26,776 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:45:26,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:45:26,798 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:45:26,821 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:45:26,821 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:45:26,821 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:45:26,821 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:45:26,822 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:45:26,822 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:45:26,822 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:45:26,822 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:45:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 23:45:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 23:45:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:26,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:26,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:26,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:26,857 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-21 23:45:26,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:26,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822097660] [2020-08-21 23:45:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-21 23:45:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 23:45:27,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822097660] [2020-08-21 23:45:27,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:27,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 23:45:27,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491776664] [2020-08-21 23:45:27,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:45:27,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:45:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:45:27,122 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-21 23:45:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:27,267 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-21 23:45:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:45:27,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-21 23:45:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:27,280 INFO L225 Difference]: With dead ends: 41 [2020-08-21 23:45:27,280 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 23:45:27,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:45:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 23:45:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 23:45:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 23:45:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-21 23:45:27,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-21 23:45:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:27,333 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-21 23:45:27,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:45:27,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-21 23:45:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 23:45:27,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:27,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:27,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:45:27,337 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-21 23:45:27,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:27,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958801341] [2020-08-21 23:45:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 23:45:27,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958801341] [2020-08-21 23:45:27,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:27,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:45:27,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646357646] [2020-08-21 23:45:27,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:45:27,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:45:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:45:27,491 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-21 23:45:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:27,569 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-21 23:45:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:45:27,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 23:45:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:27,571 INFO L225 Difference]: With dead ends: 29 [2020-08-21 23:45:27,571 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 23:45:27,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:45:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 23:45:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 23:45:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 23:45:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-21 23:45:27,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-21 23:45:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:27,582 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-21 23:45:27,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:45:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-21 23:45:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 23:45:27,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:27,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:27,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:45:27,585 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-21 23:45:27,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:27,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932644275] [2020-08-21 23:45:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:27,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 23:45:28,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932644275] [2020-08-21 23:45:28,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:28,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 23:45:28,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823592399] [2020-08-21 23:45:28,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 23:45:28,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:28,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 23:45:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:45:28,073 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-21 23:45:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:28,441 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-21 23:45:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:45:28,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-21 23:45:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:28,444 INFO L225 Difference]: With dead ends: 43 [2020-08-21 23:45:28,444 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 23:45:28,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:45:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 23:45:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-21 23:45:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 23:45:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-21 23:45:28,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-21 23:45:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:28,460 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-21 23:45:28,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 23:45:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-21 23:45:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 23:45:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:28,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:28,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:45:28,463 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-21 23:45:28,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:28,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445832905] [2020-08-21 23:45:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:45:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 23:45:28,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445832905] [2020-08-21 23:45:28,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 23:45:28,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754593763] [2020-08-21 23:45:28,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:45:28,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:45:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:45:28,584 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-21 23:45:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:28,658 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-21 23:45:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:45:28,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-21 23:45:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:28,660 INFO L225 Difference]: With dead ends: 54 [2020-08-21 23:45:28,660 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 23:45:28,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:45:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 23:45:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 23:45:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 23:45:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-21 23:45:28,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-21 23:45:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:28,670 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-21 23:45:28,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:45:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-21 23:45:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 23:45:28,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:28,672 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:28,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:45:28,672 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-21 23:45:28,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:28,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658152969] [2020-08-21 23:45:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 23:45:29,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658152969] [2020-08-21 23:45:29,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:29,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 23:45:29,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010970145] [2020-08-21 23:45:29,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 23:45:29,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 23:45:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:45:29,195 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-21 23:45:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:29,625 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-21 23:45:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:45:29,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-21 23:45:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:29,627 INFO L225 Difference]: With dead ends: 39 [2020-08-21 23:45:29,627 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 23:45:29,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:45:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 23:45:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-21 23:45:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 23:45:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-21 23:45:29,638 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-21 23:45:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:29,638 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-21 23:45:29,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 23:45:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-21 23:45:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 23:45:29,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:29,643 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:29,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:45:29,644 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-21 23:45:29,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:29,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600846547] [2020-08-21 23:45:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:29,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-21 23:45:30,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600846547] [2020-08-21 23:45:30,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:30,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 23:45:30,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788758954] [2020-08-21 23:45:30,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 23:45:30,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:30,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 23:45:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:45:30,122 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-21 23:45:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:30,678 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-21 23:45:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:45:30,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-21 23:45:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:30,680 INFO L225 Difference]: With dead ends: 42 [2020-08-21 23:45:30,680 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 23:45:30,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:45:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 23:45:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 23:45:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 23:45:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-21 23:45:30,690 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-21 23:45:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:30,690 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-21 23:45:30,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 23:45:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-21 23:45:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:45:30,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:30,695 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:30,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:45:30,695 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:30,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:30,696 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-21 23:45:30,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:30,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585545477] [2020-08-21 23:45:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:30,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:31,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:31,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-21 23:45:31,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585545477] [2020-08-21 23:45:31,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:31,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 23:45:31,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806730172] [2020-08-21 23:45:31,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 23:45:31,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 23:45:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-21 23:45:31,321 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-21 23:45:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:31,999 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 23:45:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:45:31,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-21 23:45:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:32,001 INFO L225 Difference]: With dead ends: 45 [2020-08-21 23:45:32,001 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 23:45:32,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:45:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 23:45:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-21 23:45:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 23:45:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 23:45:32,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-21 23:45:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:32,012 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 23:45:32,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 23:45:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 23:45:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 23:45:32,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:32,014 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:32,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:45:32,015 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-21 23:45:32,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:32,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832147718] [2020-08-21 23:45:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 23:45:32,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832147718] [2020-08-21 23:45:32,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:32,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 23:45:32,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221111529] [2020-08-21 23:45:32,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 23:45:32,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:32,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 23:45:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:45:32,373 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-21 23:45:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:32,836 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-21 23:45:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:45:32,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-21 23:45:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:32,838 INFO L225 Difference]: With dead ends: 47 [2020-08-21 23:45:32,838 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:45:32,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:45:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:45:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 23:45:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 23:45:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-21 23:45:32,849 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-21 23:45:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:32,849 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-21 23:45:32,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 23:45:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-21 23:45:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 23:45:32,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:32,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:32,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:45:32,851 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-21 23:45:32,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:32,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089521498] [2020-08-21 23:45:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:32,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-21 23:45:33,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089521498] [2020-08-21 23:45:33,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:33,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 23:45:33,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080048978] [2020-08-21 23:45:33,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 23:45:33,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 23:45:33,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:45:33,171 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-21 23:45:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:33,489 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-21 23:45:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:45:33,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-21 23:45:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:33,492 INFO L225 Difference]: With dead ends: 47 [2020-08-21 23:45:33,492 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:45:33,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:45:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:45:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 23:45:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 23:45:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-21 23:45:33,502 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-21 23:45:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:33,502 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-21 23:45:33,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 23:45:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-21 23:45:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:45:33,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:33,503 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:33,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:45:33,504 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-21 23:45:33,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:33,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354892964] [2020-08-21 23:45:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-21 23:45:33,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354892964] [2020-08-21 23:45:33,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:33,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 23:45:33,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187749555] [2020-08-21 23:45:33,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 23:45:33,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 23:45:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:45:33,995 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-21 23:45:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:34,632 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-21 23:45:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:45:34,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-21 23:45:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:34,633 INFO L225 Difference]: With dead ends: 47 [2020-08-21 23:45:34,633 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:45:34,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-21 23:45:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:45:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-21 23:45:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 23:45:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-21 23:45:34,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-21 23:45:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:34,642 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-21 23:45:34,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 23:45:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-21 23:45:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:45:34,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:34,643 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:34,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:45:34,643 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-21 23:45:34,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:34,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025141458] [2020-08-21 23:45:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:34,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:34,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:34,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:35,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:35,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:35,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-21 23:45:35,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025141458] [2020-08-21 23:45:35,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:35,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 23:45:35,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107048061] [2020-08-21 23:45:35,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 23:45:35,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 23:45:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-21 23:45:35,255 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-21 23:45:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:36,076 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-21 23:45:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:45:36,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-21 23:45:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:36,079 INFO L225 Difference]: With dead ends: 47 [2020-08-21 23:45:36,079 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:45:36,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 23:45:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:45:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-21 23:45:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 23:45:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 23:45:36,087 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-21 23:45:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:36,087 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 23:45:36,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 23:45:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 23:45:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:45:36,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:36,089 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:36,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:45:36,089 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:36,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-21 23:45:36,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:36,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808468887] [2020-08-21 23:45:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 23:45:36,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808468887] [2020-08-21 23:45:36,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:36,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 23:45:36,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406130498] [2020-08-21 23:45:36,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 23:45:36,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 23:45:36,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:45:36,763 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-21 23:45:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:37,644 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-21 23:45:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:45:37,645 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-21 23:45:37,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:37,647 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:37,647 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:37,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-21 23:45:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 23:45:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:45:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 23:45:37,656 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-21 23:45:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:37,657 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 23:45:37,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 23:45:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 23:45:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 23:45:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:37,658 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:37,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:45:37,659 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-21 23:45:37,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:37,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270493346] [2020-08-21 23:45:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:37,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:38,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:38,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 23:45:38,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270493346] [2020-08-21 23:45:38,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:38,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 23:45:38,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086513171] [2020-08-21 23:45:38,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 23:45:38,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 23:45:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:45:38,416 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-21 23:45:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:39,507 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-21 23:45:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:45:39,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 23:45:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:39,509 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:39,510 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:39,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-21 23:45:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 23:45:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 23:45:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-21 23:45:39,517 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-21 23:45:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:39,518 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-21 23:45:39,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 23:45:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-21 23:45:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 23:45:39,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:39,519 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:39,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:45:39,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-21 23:45:39,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:39,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430574929] [2020-08-21 23:45:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:39,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:40,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:40,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 23:45:40,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430574929] [2020-08-21 23:45:40,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:40,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 23:45:40,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421479106] [2020-08-21 23:45:40,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 23:45:40,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 23:45:40,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:45:40,257 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-21 23:45:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:41,215 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-21 23:45:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:45:41,216 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 23:45:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:41,217 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:41,217 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:41,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 23:45:41,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 23:45:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:45:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-21 23:45:41,233 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-21 23:45:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:41,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-21 23:45:41,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 23:45:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-21 23:45:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:45:41,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:41,234 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:41,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:45:41,237 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-21 23:45:41,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:41,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993746376] [2020-08-21 23:45:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-21 23:45:41,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993746376] [2020-08-21 23:45:41,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:41,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 23:45:41,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891160210] [2020-08-21 23:45:41,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 23:45:41,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 23:45:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:45:41,798 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-21 23:45:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:42,434 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-21 23:45:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:45:42,435 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-21 23:45:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:42,436 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:42,436 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:42,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-21 23:45:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 23:45:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:45:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-21 23:45:42,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-21 23:45:42,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:42,444 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-21 23:45:42,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 23:45:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-21 23:45:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:45:42,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:42,445 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:42,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 23:45:42,446 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-21 23:45:42,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:42,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556323679] [2020-08-21 23:45:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 23:45:42,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556323679] [2020-08-21 23:45:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 23:45:42,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031735397] [2020-08-21 23:45:42,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 23:45:42,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 23:45:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:45:42,820 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-21 23:45:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:43,301 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-21 23:45:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:45:43,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-21 23:45:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:43,303 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:43,303 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:43,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:45:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 23:45:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:45:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-21 23:45:43,310 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-21 23:45:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:43,310 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-21 23:45:43,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 23:45:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-21 23:45:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 23:45:43,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:43,311 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:43,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 23:45:43,312 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 15 times [2020-08-21 23:45:43,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:43,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610977187] [2020-08-21 23:45:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:44,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-21 23:45:44,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610977187] [2020-08-21 23:45:44,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:44,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 23:45:44,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991852532] [2020-08-21 23:45:44,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 23:45:44,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 23:45:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-21 23:45:44,197 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 28 states. [2020-08-21 23:45:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:45,345 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-21 23:45:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:45:45,346 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 23:45:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:45,348 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:45,348 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:45,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 23:45:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-21 23:45:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:45:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 23:45:45,355 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 79 [2020-08-21 23:45:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:45,356 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 23:45:45,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 23:45:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 23:45:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 23:45:45,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:45,357 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:45,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 23:45:45,357 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 16 times [2020-08-21 23:45:45,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:45,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395980385] [2020-08-21 23:45:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-21 23:45:45,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395980385] [2020-08-21 23:45:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:45,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 23:45:45,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404410927] [2020-08-21 23:45:45,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 23:45:45,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 23:45:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:45:45,723 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 19 states. [2020-08-21 23:45:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:46,340 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-21 23:45:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:45:46,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-21 23:45:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:46,342 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:45:46,342 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:46,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-21 23:45:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 23:45:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 23:45:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-21 23:45:46,349 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 51 [2020-08-21 23:45:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:46,349 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-21 23:45:46,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 23:45:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-21 23:45:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 23:45:46,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:46,350 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:46,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 23:45:46,351 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-21 23:45:46,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:46,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92634731] [2020-08-21 23:45:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:45:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:46,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-21 23:45:47,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92634731] [2020-08-21 23:45:47,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:47,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 23:45:47,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441364871] [2020-08-21 23:45:47,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 23:45:47,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 23:45:47,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-21 23:45:47,141 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-21 23:45:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:48,286 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-21 23:45:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:45:48,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-21 23:45:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:48,288 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:45:48,288 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:45:48,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-21 23:45:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:45:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:45:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:45:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 23:45:48,296 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-21 23:45:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:48,296 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 23:45:48,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 23:45:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 23:45:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 23:45:48,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:48,298 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:48,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 23:45:48,298 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:48,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-21 23:45:48,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:48,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666576560] [2020-08-21 23:45:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:45:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:48,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:49,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-21 23:45:49,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666576560] [2020-08-21 23:45:49,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:49,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 23:45:49,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872828198] [2020-08-21 23:45:49,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 23:45:49,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 23:45:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-21 23:45:49,139 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-21 23:45:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:50,394 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-21 23:45:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:45:50,395 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 23:45:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:50,397 INFO L225 Difference]: With dead ends: 55 [2020-08-21 23:45:50,397 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 23:45:50,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 23:45:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 23:45:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-21 23:45:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:45:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 23:45:50,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-21 23:45:50,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:50,405 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 23:45:50,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 23:45:50,405 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 23:45:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 23:45:50,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:50,406 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:50,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 23:45:50,407 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-21 23:45:50,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:50,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036480647] [2020-08-21 23:45:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:45:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:50,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:51,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:51,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:51,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 23:45:51,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036480647] [2020-08-21 23:45:51,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:51,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 23:45:51,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195393922] [2020-08-21 23:45:51,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 23:45:51,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 23:45:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:45:51,463 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-21 23:45:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:52,965 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-21 23:45:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:45:52,966 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 23:45:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:52,967 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:45:52,968 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:45:52,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 23:45:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:45:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-21 23:45:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 23:45:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-21 23:45:52,974 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-21 23:45:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:52,975 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-21 23:45:52,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 23:45:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-21 23:45:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 23:45:52,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:52,976 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:52,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 23:45:52,976 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-21 23:45:52,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:52,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737924752] [2020-08-21 23:45:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:45:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-21 23:45:53,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737924752] [2020-08-21 23:45:53,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:53,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 23:45:53,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478684419] [2020-08-21 23:45:53,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 23:45:53,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 23:45:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:45:53,533 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-21 23:45:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:54,266 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-21 23:45:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:45:54,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-21 23:45:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:54,273 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:45:54,274 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:45:54,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:45:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:45:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:45:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:45:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-21 23:45:54,288 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-21 23:45:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:54,288 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-21 23:45:54,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 23:45:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-21 23:45:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 23:45:54,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:54,295 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:54,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 23:45:54,296 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-21 23:45:54,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:54,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446775152] [2020-08-21 23:45:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:45:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:55,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:55,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-21 23:45:55,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446775152] [2020-08-21 23:45:55,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:55,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 23:45:55,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882226368] [2020-08-21 23:45:55,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 23:45:55,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:55,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 23:45:55,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:45:55,147 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-21 23:45:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:56,170 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-21 23:45:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:45:56,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-21 23:45:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:56,172 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:45:56,172 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:45:56,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 23:45:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:45:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:45:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:45:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-21 23:45:56,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-21 23:45:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:56,177 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-21 23:45:56,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 23:45:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-21 23:45:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 23:45:56,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:56,178 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:56,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 23:45:56,179 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-21 23:45:56,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:56,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041839920] [2020-08-21 23:45:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:45:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-21 23:45:56,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041839920] [2020-08-21 23:45:56,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:56,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 23:45:56,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626790752] [2020-08-21 23:45:56,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 23:45:56,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 23:45:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:45:56,652 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-21 23:45:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:57,456 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-21 23:45:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:45:57,456 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-21 23:45:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:57,458 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:45:57,458 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:45:57,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 23:45:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:45:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:45:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:45:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-21 23:45:57,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-21 23:45:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:57,464 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-21 23:45:57,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 23:45:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-21 23:45:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 23:45:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:57,466 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:57,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 23:45:57,466 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:57,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:57,466 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 23 times [2020-08-21 23:45:57,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:57,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470612820] [2020-08-21 23:45:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:45:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:45:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:57,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:45:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-21 23:45:58,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470612820] [2020-08-21 23:45:58,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:58,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 23:45:58,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415446333] [2020-08-21 23:45:58,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 23:45:58,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 23:45:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-21 23:45:58,590 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 32 states. [2020-08-21 23:46:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:00,254 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-21 23:46:00,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:46:00,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-21 23:46:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:00,256 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:46:00,256 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:46:00,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 23:46:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:46:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:46:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:46:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-21 23:46:00,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 93 [2020-08-21 23:46:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:00,263 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-21 23:46:00,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 23:46:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-21 23:46:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 23:46:00,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:00,264 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:00,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 23:46:00,264 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-21 23:46:00,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:00,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312607862] [2020-08-21 23:46:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:46:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:01,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 23:46:01,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312607862] [2020-08-21 23:46:01,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:01,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 23:46:01,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635489454] [2020-08-21 23:46:01,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 23:46:01,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 23:46:01,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:46:01,322 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-21 23:46:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:02,669 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-21 23:46:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:46:02,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 23:46:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:02,671 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:46:02,672 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:46:02,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-21 23:46:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:46:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-21 23:46:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 23:46:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-21 23:46:02,678 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-21 23:46:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:02,678 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-21 23:46:02,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 23:46:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-21 23:46:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:46:02,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:02,679 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:02,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 23:46:02,679 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 25 times [2020-08-21 23:46:02,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:02,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413549569] [2020-08-21 23:46:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:02,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:02,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:02,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:02,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:02,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:03,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:46:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:03,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:03,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-21 23:46:03,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413549569] [2020-08-21 23:46:03,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:03,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 23:46:03,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006419333] [2020-08-21 23:46:03,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 23:46:03,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:03,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 23:46:03,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-21 23:46:03,304 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 24 states. [2020-08-21 23:46:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:04,151 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-21 23:46:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:46:04,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-21 23:46:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:04,153 INFO L225 Difference]: With dead ends: 53 [2020-08-21 23:46:04,153 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 23:46:04,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 23:46:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 23:46:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-21 23:46:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 23:46:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-21 23:46:04,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 65 [2020-08-21 23:46:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:04,161 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-21 23:46:04,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 23:46:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-21 23:46:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 23:46:04,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:04,162 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:04,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 23:46:04,162 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-21 23:46:04,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:04,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186720238] [2020-08-21 23:46:04,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:46:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:04,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-21 23:46:05,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186720238] [2020-08-21 23:46:05,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:05,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 23:46:05,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915008384] [2020-08-21 23:46:05,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 23:46:05,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 23:46:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-21 23:46:05,204 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-21 23:46:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:06,647 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-21 23:46:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:46:06,649 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-21 23:46:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:06,650 INFO L225 Difference]: With dead ends: 56 [2020-08-21 23:46:06,650 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:46:06,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 23:46:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:46:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-21 23:46:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 23:46:06,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-21 23:46:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:06,657 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 23:46:06,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 23:46:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 23:46:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 23:46:06,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:06,658 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:06,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 23:46:06,659 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-21 23:46:06,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:06,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133698962] [2020-08-21 23:46:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 23:46:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:06,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-21 23:46:07,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133698962] [2020-08-21 23:46:07,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:07,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 23:46:07,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041393776] [2020-08-21 23:46:07,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 23:46:07,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 23:46:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-21 23:46:07,643 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-21 23:46:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:09,213 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-21 23:46:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:46:09,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-21 23:46:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:09,216 INFO L225 Difference]: With dead ends: 58 [2020-08-21 23:46:09,216 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 23:46:09,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-21 23:46:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 23:46:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 23:46:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 23:46:09,223 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-21 23:46:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:09,223 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 23:46:09,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 23:46:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 23:46:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 23:46:09,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:09,225 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:09,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 23:46:09,225 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:09,225 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-21 23:46:09,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:09,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728711081] [2020-08-21 23:46:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 23:46:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:09,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:10,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:10,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:10,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-21 23:46:10,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728711081] [2020-08-21 23:46:10,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:10,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 23:46:10,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773307989] [2020-08-21 23:46:10,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 23:46:10,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 23:46:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-21 23:46:10,330 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-21 23:46:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:12,077 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-21 23:46:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:46:12,078 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-21 23:46:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:12,079 INFO L225 Difference]: With dead ends: 58 [2020-08-21 23:46:12,079 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 23:46:12,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 23:46:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 23:46:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-21 23:46:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-21 23:46:12,086 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-21 23:46:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:12,086 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-21 23:46:12,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 23:46:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-21 23:46:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 23:46:12,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:12,087 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:12,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 23:46:12,088 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:12,088 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-21 23:46:12,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:12,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35193120] [2020-08-21 23:46:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 23:46:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:12,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:13,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:13,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-21 23:46:13,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35193120] [2020-08-21 23:46:13,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:13,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 23:46:13,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445629205] [2020-08-21 23:46:13,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 23:46:13,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 23:46:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:46:13,437 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states. [2020-08-21 23:46:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:15,324 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-08-21 23:46:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:46:15,325 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-08-21 23:46:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:15,326 INFO L225 Difference]: With dead ends: 56 [2020-08-21 23:46:15,326 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:46:15,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2020-08-21 23:46:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:46:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-21 23:46:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 23:46:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-21 23:46:15,333 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-08-21 23:46:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:15,333 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-21 23:46:15,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 23:46:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-21 23:46:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 23:46:15,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:15,334 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:15,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 23:46:15,335 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1159270008, now seen corresponding path program 30 times [2020-08-21 23:46:15,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:15,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188183009] [2020-08-21 23:46:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:46:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-08-21 23:46:15,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188183009] [2020-08-21 23:46:15,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:15,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 23:46:15,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117797792] [2020-08-21 23:46:15,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 23:46:15,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 23:46:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:46:15,946 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 21 states. [2020-08-21 23:46:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:16,874 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-08-21 23:46:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:46:16,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-08-21 23:46:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:16,877 INFO L225 Difference]: With dead ends: 56 [2020-08-21 23:46:16,877 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:46:16,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:46:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:46:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-21 23:46:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2020-08-21 23:46:16,883 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 93 [2020-08-21 23:46:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:16,884 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2020-08-21 23:46:16,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 23:46:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2020-08-21 23:46:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 23:46:16,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:16,885 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:16,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 23:46:16,885 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:16,886 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 31 times [2020-08-21 23:46:16,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:16,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423389559] [2020-08-21 23:46:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:16,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:16,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:46:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:18,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:18,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-21 23:46:18,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423389559] [2020-08-21 23:46:18,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:18,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-21 23:46:18,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930989195] [2020-08-21 23:46:18,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-21 23:46:18,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-21 23:46:18,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:46:18,222 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand 34 states. [2020-08-21 23:46:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:20,001 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2020-08-21 23:46:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 23:46:20,002 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-08-21 23:46:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:20,003 INFO L225 Difference]: With dead ends: 56 [2020-08-21 23:46:20,003 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:46:20,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=2171, Unknown=0, NotChecked=0, Total=2352 [2020-08-21 23:46:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:46:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-21 23:46:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 71 transitions. [2020-08-21 23:46:20,010 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 71 transitions. Word has length 100 [2020-08-21 23:46:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:20,010 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 71 transitions. [2020-08-21 23:46:20,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-21 23:46:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 71 transitions. [2020-08-21 23:46:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 23:46:20,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:20,011 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:20,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 23:46:20,012 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash 572340508, now seen corresponding path program 32 times [2020-08-21 23:46:20,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:20,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338093757] [2020-08-21 23:46:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 23:46:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-08-21 23:46:20,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338093757] [2020-08-21 23:46:20,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:46:20,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 23:46:20,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038355596] [2020-08-21 23:46:20,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 23:46:20,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:46:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 23:46:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-21 23:46:20,646 INFO L87 Difference]: Start difference. First operand 48 states and 71 transitions. Second operand 24 states. [2020-08-21 23:46:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:46:21,706 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2020-08-21 23:46:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 23:46:21,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-21 23:46:21,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:46:21,708 INFO L225 Difference]: With dead ends: 56 [2020-08-21 23:46:21,708 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:46:21,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 23:46:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:46:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-21 23:46:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 23:46:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 70 transitions. [2020-08-21 23:46:21,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 70 transitions. Word has length 65 [2020-08-21 23:46:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:46:21,717 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 70 transitions. [2020-08-21 23:46:21,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 23:46:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 70 transitions. [2020-08-21 23:46:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 23:46:21,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:46:21,719 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:46:21,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 23:46:21,721 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:46:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:46:21,722 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 33 times [2020-08-21 23:46:21,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:46:21,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383629053] [2020-08-21 23:46:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:46:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:46:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:21,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 23:46:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:21,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:21,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:21,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:46:22,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:46:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat