/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:39:06,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:39:06,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:39:06,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:39:06,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:39:06,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:39:06,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:39:06,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:39:06,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:39:06,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:39:06,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:39:06,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:39:06,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:39:06,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:39:06,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:39:06,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:39:06,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:39:06,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:39:06,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:39:06,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:39:06,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:39:06,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:39:06,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:39:06,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:39:06,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:39:06,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:39:06,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:39:06,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:39:06,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:39:06,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:39:06,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:39:06,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:39:06,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:39:06,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:39:06,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:39:06,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:39:06,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:39:06,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:39:06,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:39:06,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:39:06,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:39:06,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:39:06,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:39:06,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:39:06,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:39:06,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:39:06,735 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:39:06,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:39:06,736 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:39:06,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:39:06,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:39:06,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:39:06,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:39:06,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:39:06,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:39:06,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:39:06,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:39:06,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:39:06,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:39:06,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:39:06,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:39:06,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:39:06,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:39:06,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:39:06,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:39:06,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:39:06,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:39:06,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:39:06,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:39:06,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:39:06,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:39:06,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:39:07,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:39:07,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:39:07,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:39:07,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:39:07,074 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:39:07,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-18 18:39:07,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c102a01d0/62a536b2155c4ccdb82fab6bed8c327e/FLAGe76b0a6f4 [2020-08-18 18:39:07,620 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:39:07,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-18 18:39:07,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c102a01d0/62a536b2155c4ccdb82fab6bed8c327e/FLAGe76b0a6f4 [2020-08-18 18:39:07,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c102a01d0/62a536b2155c4ccdb82fab6bed8c327e [2020-08-18 18:39:07,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:39:07,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:39:07,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:39:07,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:39:07,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:39:07,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:39:07" (1/1) ... [2020-08-18 18:39:07,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a39a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:07, skipping insertion in model container [2020-08-18 18:39:07,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:39:07" (1/1) ... [2020-08-18 18:39:07,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:39:08,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:39:08,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:39:08,261 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:39:08,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:39:08,318 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:39:08,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08 WrapperNode [2020-08-18 18:39:08,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:39:08,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:39:08,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:39:08,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:39:08,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... [2020-08-18 18:39:08,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:39:08,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:39:08,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:39:08,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:39:08,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:39:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:39:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:39:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:39:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-18 18:39:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-18 18:39:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-18 18:39:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:39:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:39:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 18:39:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:39:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:39:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-18 18:39:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-18 18:39:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-18 18:39:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:39:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:39:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:39:08,974 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:39:08,975 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 18:39:08,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:39:08 BoogieIcfgContainer [2020-08-18 18:39:08,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:39:08,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:39:08,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:39:08,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:39:08,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:39:07" (1/3) ... [2020-08-18 18:39:08,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594871fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:39:08, skipping insertion in model container [2020-08-18 18:39:08,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:39:08" (2/3) ... [2020-08-18 18:39:08,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594871fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:39:08, skipping insertion in model container [2020-08-18 18:39:08,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:39:08" (3/3) ... [2020-08-18 18:39:08,987 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-18 18:39:08,996 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:39:09,002 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:39:09,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:39:09,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:39:09,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:39:09,034 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:39:09,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:39:09,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:39:09,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:39:09,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:39:09,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:39:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-18 18:39:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 18:39:09,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:09,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:09,063 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-18 18:39:09,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:09,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752631120] [2020-08-18 18:39:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:39:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 18:39:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 18:39:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:09,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752631120] [2020-08-18 18:39:09,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:09,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 18:39:09,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101903860] [2020-08-18 18:39:09,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:39:09,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:09,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:39:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:39:09,407 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-18 18:39:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:09,579 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-18 18:39:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:39:09,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-18 18:39:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:09,600 INFO L225 Difference]: With dead ends: 136 [2020-08-18 18:39:09,601 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 18:39:09,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 18:39:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-18 18:39:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 18:39:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-18 18:39:09,653 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-18 18:39:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:09,654 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-18 18:39:09,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:39:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-18 18:39:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 18:39:09,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:09,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:09,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:39:09,659 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-18 18:39:09,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:09,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529170819] [2020-08-18 18:39:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:39:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 18:39:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:39:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:09,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529170819] [2020-08-18 18:39:09,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:09,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 18:39:09,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049991589] [2020-08-18 18:39:09,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:39:09,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:39:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:39:09,823 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-18 18:39:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:09,908 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-18 18:39:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:39:09,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 18:39:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:09,915 INFO L225 Difference]: With dead ends: 129 [2020-08-18 18:39:09,915 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 18:39:09,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 18:39:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-18 18:39:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 18:39:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-18 18:39:09,969 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-18 18:39:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:09,969 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-18 18:39:09,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:39:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-18 18:39:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 18:39:09,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:09,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:09,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:39:09,975 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-18 18:39:09,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:09,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906140860] [2020-08-18 18:39:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:39:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 18:39:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:39:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:10,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906140860] [2020-08-18 18:39:10,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:10,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:39:10,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887970214] [2020-08-18 18:39:10,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:39:10,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:39:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:10,216 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-18 18:39:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:10,330 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-18 18:39:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:39:10,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-18 18:39:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:10,333 INFO L225 Difference]: With dead ends: 145 [2020-08-18 18:39:10,333 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 18:39:10,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:39:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 18:39:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-18 18:39:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 18:39:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-18 18:39:10,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-18 18:39:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:10,351 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-18 18:39:10,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:39:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-18 18:39:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 18:39:10,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:10,353 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:10,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:39:10,354 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-18 18:39:10,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:10,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759920645] [2020-08-18 18:39:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 18:39:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:39:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:39:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:10,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759920645] [2020-08-18 18:39:10,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:10,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:39:10,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295730916] [2020-08-18 18:39:10,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:39:10,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:39:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:10,446 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-18 18:39:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:10,516 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-18 18:39:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:39:10,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 18:39:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:10,518 INFO L225 Difference]: With dead ends: 156 [2020-08-18 18:39:10,519 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 18:39:10,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:39:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 18:39:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-18 18:39:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 18:39:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-18 18:39:10,534 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-18 18:39:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:10,535 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-18 18:39:10,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:39:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-18 18:39:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 18:39:10,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:10,537 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:10,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:39:10,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-18 18:39:10,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:10,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843903146] [2020-08-18 18:39:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 18:39:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 18:39:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:39:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:10,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843903146] [2020-08-18 18:39:10,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:10,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:39:10,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449147662] [2020-08-18 18:39:10,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:39:10,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:39:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:39:10,673 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-18 18:39:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:10,791 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-18 18:39:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:39:10,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-18 18:39:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:10,794 INFO L225 Difference]: With dead ends: 166 [2020-08-18 18:39:10,794 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 18:39:10,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:39:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 18:39:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-18 18:39:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 18:39:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-18 18:39:10,811 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-18 18:39:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:10,811 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-18 18:39:10,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:39:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-18 18:39:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 18:39:10,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:10,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:10,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:39:10,815 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:10,815 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-18 18:39:10,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:10,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616147593] [2020-08-18 18:39:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 18:39:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 18:39:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:39:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:10,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616147593] [2020-08-18 18:39:10,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:10,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:39:10,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660010360] [2020-08-18 18:39:10,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:39:10,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:39:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:39:10,971 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-18 18:39:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:11,087 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 18:39:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:39:11,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 18:39:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:11,089 INFO L225 Difference]: With dead ends: 176 [2020-08-18 18:39:11,089 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 18:39:11,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:39:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 18:39:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-18 18:39:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 18:39:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-18 18:39:11,117 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-18 18:39:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:11,118 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-18 18:39:11,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:39:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-18 18:39:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 18:39:11,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:11,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:11,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:39:11,121 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-18 18:39:11,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:11,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400976042] [2020-08-18 18:39:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:39:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:39:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 18:39:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400976042] [2020-08-18 18:39:11,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:11,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:39:11,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381806301] [2020-08-18 18:39:11,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:39:11,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:39:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:39:11,320 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-18 18:39:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:11,456 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-18 18:39:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:39:11,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-18 18:39:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:11,459 INFO L225 Difference]: With dead ends: 178 [2020-08-18 18:39:11,460 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 18:39:11,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 18:39:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-18 18:39:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 18:39:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-18 18:39:11,483 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-18 18:39:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:11,486 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-18 18:39:11,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:39:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-18 18:39:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 18:39:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:11,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:11,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:39:11,490 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-18 18:39:11,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:11,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491322718] [2020-08-18 18:39:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 18:39:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 18:39:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 18:39:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:11,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491322718] [2020-08-18 18:39:11,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:11,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:39:11,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816695534] [2020-08-18 18:39:11,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:39:11,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:39:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:39:11,614 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-18 18:39:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:11,709 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-18 18:39:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:39:11,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-18 18:39:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:11,713 INFO L225 Difference]: With dead ends: 193 [2020-08-18 18:39:11,713 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 18:39:11,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 18:39:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-18 18:39:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 18:39:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-18 18:39:11,730 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-18 18:39:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:11,730 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-18 18:39:11,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:39:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-18 18:39:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 18:39:11,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:11,732 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:11,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:39:11,732 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-18 18:39:11,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:11,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821607227] [2020-08-18 18:39:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 18:39:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:39:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 18:39:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:11,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821607227] [2020-08-18 18:39:11,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:11,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:39:11,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322730203] [2020-08-18 18:39:11,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:39:11,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:39:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:11,920 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-18 18:39:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:12,084 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-18 18:39:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:39:12,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-18 18:39:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:12,086 INFO L225 Difference]: With dead ends: 190 [2020-08-18 18:39:12,086 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 18:39:12,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 18:39:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-18 18:39:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 18:39:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-18 18:39:12,098 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-18 18:39:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:12,099 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-18 18:39:12,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:39:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-18 18:39:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 18:39:12,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:12,101 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:12,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:39:12,101 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-18 18:39:12,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:12,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600865779] [2020-08-18 18:39:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 18:39:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 18:39:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 18:39:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:12,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600865779] [2020-08-18 18:39:12,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:12,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:39:12,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816425792] [2020-08-18 18:39:12,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:39:12,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:39:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:12,217 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-18 18:39:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:12,322 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-18 18:39:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:39:12,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 18:39:12,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:12,324 INFO L225 Difference]: With dead ends: 210 [2020-08-18 18:39:12,325 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 18:39:12,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 18:39:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-18 18:39:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 18:39:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-18 18:39:12,336 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-18 18:39:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:12,336 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-18 18:39:12,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:39:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-18 18:39:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 18:39:12,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:12,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:12,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:39:12,338 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-18 18:39:12,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:12,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353442884] [2020-08-18 18:39:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:39:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:39:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 18:39:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:12,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353442884] [2020-08-18 18:39:12,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:12,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:39:12,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306241244] [2020-08-18 18:39:12,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:39:12,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:39:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:12,524 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-18 18:39:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:12,714 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-18 18:39:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:12,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-18 18:39:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:12,720 INFO L225 Difference]: With dead ends: 202 [2020-08-18 18:39:12,720 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 18:39:12,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 18:39:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-18 18:39:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 18:39:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-18 18:39:12,740 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-18 18:39:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:12,740 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-18 18:39:12,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:39:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-18 18:39:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:39:12,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:12,742 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:12,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:39:12,742 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:12,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-18 18:39:12,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:12,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257144639] [2020-08-18 18:39:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 18:39:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 18:39:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 18:39:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:12,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257144639] [2020-08-18 18:39:12,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:12,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:39:12,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012276945] [2020-08-18 18:39:12,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:39:12,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:12,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:39:12,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:12,871 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-18 18:39:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:12,997 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-18 18:39:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:12,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 18:39:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:12,999 INFO L225 Difference]: With dead ends: 227 [2020-08-18 18:39:12,999 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 18:39:13,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 18:39:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-18 18:39:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 18:39:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-18 18:39:13,012 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-18 18:39:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:13,012 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-18 18:39:13,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:39:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-18 18:39:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 18:39:13,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:13,014 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:13,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:39:13,014 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-18 18:39:13,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:13,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044832564] [2020-08-18 18:39:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:39:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 18:39:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 18:39:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:13,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044832564] [2020-08-18 18:39:13,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:13,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:39:13,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053718499] [2020-08-18 18:39:13,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:39:13,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:39:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:13,241 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-18 18:39:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:13,466 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-18 18:39:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:39:13,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-18 18:39:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:13,468 INFO L225 Difference]: With dead ends: 214 [2020-08-18 18:39:13,469 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 18:39:13,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:39:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 18:39:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-18 18:39:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 18:39:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 18:39:13,479 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-18 18:39:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:13,480 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 18:39:13,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:39:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 18:39:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 18:39:13,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:13,481 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:13,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:39:13,482 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-18 18:39:13,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:13,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75241357] [2020-08-18 18:39:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:39:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 18:39:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 18:39:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:13,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75241357] [2020-08-18 18:39:13,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:13,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:39:13,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888251805] [2020-08-18 18:39:13,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:39:13,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:13,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:39:13,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:13,624 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-18 18:39:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:13,740 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-18 18:39:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:39:13,741 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-18 18:39:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:13,742 INFO L225 Difference]: With dead ends: 244 [2020-08-18 18:39:13,743 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 18:39:13,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:39:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 18:39:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-18 18:39:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 18:39:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-18 18:39:13,755 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-18 18:39:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:13,756 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-18 18:39:13,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:39:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-18 18:39:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 18:39:13,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:13,757 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:13,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:39:13,758 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:13,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-18 18:39:13,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:13,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77091651] [2020-08-18 18:39:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:39:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 18:39:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 18:39:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:13,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77091651] [2020-08-18 18:39:13,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:13,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:39:13,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364850592] [2020-08-18 18:39:13,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:39:13,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:39:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:39:13,962 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-18 18:39:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:14,200 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-18 18:39:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:39:14,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-18 18:39:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:14,203 INFO L225 Difference]: With dead ends: 226 [2020-08-18 18:39:14,203 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 18:39:14,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 18:39:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-18 18:39:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 18:39:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-18 18:39:14,221 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-18 18:39:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:14,221 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-18 18:39:14,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:39:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-18 18:39:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 18:39:14,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:14,223 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:14,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:39:14,223 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-18 18:39:14,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:14,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983776687] [2020-08-18 18:39:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 18:39:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 18:39:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 18:39:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:14,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983776687] [2020-08-18 18:39:14,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:14,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:39:14,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440096564] [2020-08-18 18:39:14,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:39:14,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:39:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:39:14,422 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-18 18:39:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:14,556 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-18 18:39:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:39:14,557 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-18 18:39:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:14,559 INFO L225 Difference]: With dead ends: 261 [2020-08-18 18:39:14,559 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 18:39:14,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 18:39:14,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-18 18:39:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 18:39:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-18 18:39:14,572 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-18 18:39:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:14,572 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-18 18:39:14,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:39:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-18 18:39:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 18:39:14,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:14,573 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:14,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:39:14,574 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-18 18:39:14,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:14,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518161522] [2020-08-18 18:39:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 18:39:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 18:39:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 18:39:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:14,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518161522] [2020-08-18 18:39:14,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:14,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:39:14,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626811974] [2020-08-18 18:39:14,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:39:14,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:14,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:39:14,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:14,822 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-18 18:39:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:15,070 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-18 18:39:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 18:39:15,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-18 18:39:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:15,072 INFO L225 Difference]: With dead ends: 238 [2020-08-18 18:39:15,072 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 18:39:15,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 18:39:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-18 18:39:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 18:39:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-18 18:39:15,085 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-18 18:39:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:15,085 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-18 18:39:15,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:39:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-18 18:39:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 18:39:15,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:15,087 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:15,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 18:39:15,087 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-18 18:39:15,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:15,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024219631] [2020-08-18 18:39:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 18:39:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 18:39:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:39:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024219631] [2020-08-18 18:39:15,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:15,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:39:15,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788843741] [2020-08-18 18:39:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:39:15,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:39:15,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:15,262 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-18 18:39:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:15,445 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-18 18:39:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 18:39:15,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-18 18:39:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:15,451 INFO L225 Difference]: With dead ends: 278 [2020-08-18 18:39:15,451 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 18:39:15,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 18:39:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-18 18:39:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 18:39:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-18 18:39:15,470 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-18 18:39:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:15,471 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-18 18:39:15,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:39:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-18 18:39:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 18:39:15,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:15,475 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:15,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 18:39:15,476 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-18 18:39:15,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:15,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412412308] [2020-08-18 18:39:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 18:39:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 18:39:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 18:39:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:15,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412412308] [2020-08-18 18:39:15,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:15,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:39:15,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767688110] [2020-08-18 18:39:15,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:39:15,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:39:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:15,833 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-18 18:39:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:16,102 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-18 18:39:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:39:16,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-18 18:39:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:16,104 INFO L225 Difference]: With dead ends: 250 [2020-08-18 18:39:16,104 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 18:39:16,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:39:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 18:39:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-18 18:39:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 18:39:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-18 18:39:16,116 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-18 18:39:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:16,116 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-18 18:39:16,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:39:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-18 18:39:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 18:39:16,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:16,118 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:16,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 18:39:16,118 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:16,119 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-18 18:39:16,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:16,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473964258] [2020-08-18 18:39:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 18:39:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 18:39:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:39:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:16,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473964258] [2020-08-18 18:39:16,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:16,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:39:16,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161043032] [2020-08-18 18:39:16,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:39:16,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:39:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:16,294 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-18 18:39:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:16,458 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-18 18:39:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:39:16,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-18 18:39:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:16,460 INFO L225 Difference]: With dead ends: 295 [2020-08-18 18:39:16,461 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 18:39:16,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:39:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 18:39:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-18 18:39:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 18:39:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-18 18:39:16,473 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-18 18:39:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:16,473 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-18 18:39:16,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:39:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-18 18:39:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 18:39:16,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:16,474 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:16,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 18:39:16,475 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-18 18:39:16,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:16,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252290938] [2020-08-18 18:39:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 18:39:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 18:39:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 18:39:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:16,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252290938] [2020-08-18 18:39:16,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:16,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:39:16,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370592046] [2020-08-18 18:39:16,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:39:16,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:16,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:39:16,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:39:16,724 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-18 18:39:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:17,085 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-18 18:39:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:39:17,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-18 18:39:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:17,087 INFO L225 Difference]: With dead ends: 262 [2020-08-18 18:39:17,088 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 18:39:17,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:39:17,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 18:39:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-18 18:39:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 18:39:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-18 18:39:17,100 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-18 18:39:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:17,101 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-18 18:39:17,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:39:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-18 18:39:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 18:39:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:17,102 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:17,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 18:39:17,103 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-18 18:39:17,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:17,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737131170] [2020-08-18 18:39:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 18:39:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 18:39:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:39:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:17,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737131170] [2020-08-18 18:39:17,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:17,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:39:17,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911458099] [2020-08-18 18:39:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:39:17,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:39:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:39:17,305 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-18 18:39:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:17,555 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-18 18:39:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:39:17,556 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-18 18:39:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:17,558 INFO L225 Difference]: With dead ends: 312 [2020-08-18 18:39:17,558 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 18:39:17,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:39:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 18:39:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-18 18:39:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 18:39:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-18 18:39:17,570 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-18 18:39:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:17,571 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-18 18:39:17,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:39:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-18 18:39:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 18:39:17,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:17,572 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:17,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 18:39:17,573 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:17,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-18 18:39:17,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:17,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024754652] [2020-08-18 18:39:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 18:39:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:39:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 18:39:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:17,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024754652] [2020-08-18 18:39:17,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:17,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 18:39:17,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197251775] [2020-08-18 18:39:17,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:39:17,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:17,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:39:17,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:39:17,882 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-18 18:39:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:18,285 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-18 18:39:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:39:18,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-18 18:39:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:18,288 INFO L225 Difference]: With dead ends: 274 [2020-08-18 18:39:18,288 INFO L226 Difference]: Without dead ends: 187 [2020-08-18 18:39:18,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:39:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-18 18:39:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-18 18:39:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 18:39:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-18 18:39:18,303 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-18 18:39:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:18,303 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-18 18:39:18,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:39:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-18 18:39:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 18:39:18,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:18,304 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:18,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 18:39:18,305 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-18 18:39:18,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:18,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534518045] [2020-08-18 18:39:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 18:39:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 18:39:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 18:39:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:18,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534518045] [2020-08-18 18:39:18,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:18,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 18:39:18,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964043810] [2020-08-18 18:39:18,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:39:18,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:39:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:39:18,560 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-18 18:39:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:18,730 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-18 18:39:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:39:18,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-18 18:39:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:18,733 INFO L225 Difference]: With dead ends: 329 [2020-08-18 18:39:18,733 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 18:39:18,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:39:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 18:39:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-18 18:39:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 18:39:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-18 18:39:18,746 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-18 18:39:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:18,747 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-18 18:39:18,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:39:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-18 18:39:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 18:39:18,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:18,748 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:18,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 18:39:18,751 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-18 18:39:18,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:18,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304895952] [2020-08-18 18:39:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:18,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 18:39:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:39:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 18:39:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:19,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304895952] [2020-08-18 18:39:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 18:39:19,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659485938] [2020-08-18 18:39:19,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 18:39:19,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 18:39:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:39:19,100 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-18 18:39:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:19,508 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-18 18:39:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 18:39:19,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-18 18:39:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:19,510 INFO L225 Difference]: With dead ends: 286 [2020-08-18 18:39:19,510 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 18:39:19,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:39:19,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 18:39:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-18 18:39:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 18:39:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-18 18:39:19,524 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-18 18:39:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:19,525 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-18 18:39:19,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 18:39:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-18 18:39:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 18:39:19,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:19,526 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:19,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 18:39:19,526 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-18 18:39:19,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:19,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491739621] [2020-08-18 18:39:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 18:39:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 18:39:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 18:39:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491739621] [2020-08-18 18:39:19,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:19,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 18:39:19,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707453358] [2020-08-18 18:39:19,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 18:39:19,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 18:39:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:39:19,849 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-18 18:39:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:20,055 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-18 18:39:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 18:39:20,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 18:39:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:20,057 INFO L225 Difference]: With dead ends: 346 [2020-08-18 18:39:20,058 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 18:39:20,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:39:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 18:39:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-18 18:39:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 18:39:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-18 18:39:20,073 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-18 18:39:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:20,074 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-18 18:39:20,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 18:39:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-18 18:39:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 18:39:20,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:20,075 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:20,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 18:39:20,076 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-18 18:39:20,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:20,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619414032] [2020-08-18 18:39:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 18:39:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:39:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:39:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 18:39:20,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619414032] [2020-08-18 18:39:20,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:20,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:39:20,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023504487] [2020-08-18 18:39:20,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:39:20,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:39:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:39:20,159 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-18 18:39:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:20,173 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-18 18:39:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:39:20,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-18 18:39:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:20,175 INFO L225 Difference]: With dead ends: 160 [2020-08-18 18:39:20,175 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 18:39:20,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:39:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 18:39:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 18:39:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 18:39:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-18 18:39:20,186 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-18 18:39:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:20,187 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-18 18:39:20,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:39:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-18 18:39:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 18:39:20,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:20,188 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:20,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 18:39:20,189 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-18 18:39:20,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:20,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838398618] [2020-08-18 18:39:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 18:39:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:39:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 18:39:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 18:39:20,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838398618] [2020-08-18 18:39:20,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:20,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:39:20,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942344243] [2020-08-18 18:39:20,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:39:20,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:39:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:39:20,264 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-18 18:39:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:20,291 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-18 18:39:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:39:20,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-18 18:39:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:20,295 INFO L225 Difference]: With dead ends: 161 [2020-08-18 18:39:20,295 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 18:39:20,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 18:39:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 18:39:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 18:39:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-18 18:39:20,309 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-18 18:39:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:20,310 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-18 18:39:20,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:39:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-18 18:39:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 18:39:20,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:20,311 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:20,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 18:39:20,312 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:20,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-18 18:39:20,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:20,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749379880] [2020-08-18 18:39:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 18:39:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:39:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 18:39:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:20,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749379880] [2020-08-18 18:39:20,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:20,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 18:39:20,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978360496] [2020-08-18 18:39:20,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 18:39:20,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 18:39:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:39:20,683 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-18 18:39:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:21,262 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-18 18:39:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:39:21,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-18 18:39:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:21,266 INFO L225 Difference]: With dead ends: 298 [2020-08-18 18:39:21,266 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 18:39:21,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:39:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 18:39:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-18 18:39:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 18:39:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-18 18:39:21,286 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-18 18:39:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:21,287 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-18 18:39:21,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 18:39:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-18 18:39:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:39:21,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:21,288 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:21,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 18:39:21,289 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:21,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:21,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-18 18:39:21,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:21,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331640720] [2020-08-18 18:39:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:39:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 18:39:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 18:39:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:21,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331640720] [2020-08-18 18:39:21,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:21,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 18:39:21,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393039298] [2020-08-18 18:39:21,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 18:39:21,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 18:39:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:39:21,607 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-18 18:39:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:21,871 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-18 18:39:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:39:21,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-18 18:39:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:21,874 INFO L225 Difference]: With dead ends: 363 [2020-08-18 18:39:21,874 INFO L226 Difference]: Without dead ends: 264 [2020-08-18 18:39:21,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:39:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-18 18:39:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-18 18:39:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 18:39:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-18 18:39:21,892 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-18 18:39:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:21,892 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-18 18:39:21,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 18:39:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-18 18:39:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 18:39:21,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:21,893 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:21,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 18:39:21,894 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-18 18:39:21,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:21,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680376058] [2020-08-18 18:39:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 18:39:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 18:39:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 18:39:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:22,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680376058] [2020-08-18 18:39:22,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:22,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 18:39:22,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743803697] [2020-08-18 18:39:22,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 18:39:22,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 18:39:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:39:22,331 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-18 18:39:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:22,934 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-18 18:39:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 18:39:22,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-18 18:39:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:22,938 INFO L225 Difference]: With dead ends: 310 [2020-08-18 18:39:22,938 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 18:39:22,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:39:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 18:39:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-18 18:39:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 18:39:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-18 18:39:22,954 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-18 18:39:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:22,954 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-18 18:39:22,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 18:39:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-18 18:39:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 18:39:22,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:22,956 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:22,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 18:39:22,956 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:22,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-18 18:39:22,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:22,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435864132] [2020-08-18 18:39:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 18:39:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 18:39:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 18:39:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:23,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435864132] [2020-08-18 18:39:23,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:23,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 18:39:23,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259092625] [2020-08-18 18:39:23,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 18:39:23,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 18:39:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:39:23,305 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-18 18:39:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:23,559 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-18 18:39:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 18:39:23,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-18 18:39:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:23,562 INFO L225 Difference]: With dead ends: 380 [2020-08-18 18:39:23,562 INFO L226 Difference]: Without dead ends: 278 [2020-08-18 18:39:23,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:39:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-18 18:39:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-18 18:39:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-18 18:39:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-18 18:39:23,585 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-18 18:39:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:23,585 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-18 18:39:23,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 18:39:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-18 18:39:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 18:39:23,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:23,587 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:23,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 18:39:23,587 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-18 18:39:23,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:23,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541818523] [2020-08-18 18:39:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:23,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 18:39:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 18:39:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 18:39:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:24,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541818523] [2020-08-18 18:39:24,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:24,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 18:39:24,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785192306] [2020-08-18 18:39:24,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 18:39:24,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 18:39:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:39:24,044 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-18 18:39:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:24,738 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-18 18:39:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 18:39:24,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 18:39:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:24,741 INFO L225 Difference]: With dead ends: 322 [2020-08-18 18:39:24,741 INFO L226 Difference]: Without dead ends: 223 [2020-08-18 18:39:24,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:39:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-18 18:39:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-18 18:39:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 18:39:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-18 18:39:24,757 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-18 18:39:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:24,757 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-18 18:39:24,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 18:39:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-18 18:39:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 18:39:24,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:24,759 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:24,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 18:39:24,759 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:24,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:24,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-18 18:39:24,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:24,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465549195] [2020-08-18 18:39:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:24,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:39:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 18:39:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 18:39:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:25,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465549195] [2020-08-18 18:39:25,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:25,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 18:39:25,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316388117] [2020-08-18 18:39:25,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 18:39:25,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 18:39:25,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:39:25,079 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-18 18:39:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:25,371 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-18 18:39:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 18:39:25,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-18 18:39:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:25,377 INFO L225 Difference]: With dead ends: 397 [2020-08-18 18:39:25,377 INFO L226 Difference]: Without dead ends: 292 [2020-08-18 18:39:25,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:39:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-18 18:39:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-18 18:39:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 18:39:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-18 18:39:25,396 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-18 18:39:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:25,397 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-18 18:39:25,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 18:39:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-18 18:39:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 18:39:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:25,398 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:25,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 18:39:25,399 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-18 18:39:25,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:25,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293709890] [2020-08-18 18:39:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 18:39:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 18:39:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 18:39:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:25,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293709890] [2020-08-18 18:39:25,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:25,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 18:39:25,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326902382] [2020-08-18 18:39:25,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 18:39:25,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 18:39:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:39:25,895 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-18 18:39:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:26,676 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-18 18:39:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:39:26,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-18 18:39:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:26,681 INFO L225 Difference]: With dead ends: 334 [2020-08-18 18:39:26,681 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 18:39:26,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:39:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 18:39:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-18 18:39:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 18:39:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-18 18:39:26,695 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-18 18:39:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:26,696 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-18 18:39:26,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 18:39:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-18 18:39:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 18:39:26,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:26,697 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:26,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 18:39:26,698 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-18 18:39:26,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:26,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107520057] [2020-08-18 18:39:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:26,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 18:39:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 18:39:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:39:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:27,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107520057] [2020-08-18 18:39:27,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:27,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 18:39:27,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715374130] [2020-08-18 18:39:27,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 18:39:27,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 18:39:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:39:27,070 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-18 18:39:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:27,364 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-18 18:39:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:39:27,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-18 18:39:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:27,368 INFO L225 Difference]: With dead ends: 414 [2020-08-18 18:39:27,368 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 18:39:27,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:39:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 18:39:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-18 18:39:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-18 18:39:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-18 18:39:27,384 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-18 18:39:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:27,384 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-18 18:39:27,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 18:39:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-18 18:39:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 18:39:27,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:27,386 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:27,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 18:39:27,386 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-18 18:39:27,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:27,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391219757] [2020-08-18 18:39:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 18:39:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 18:39:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 18:39:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:27,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391219757] [2020-08-18 18:39:27,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:27,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 18:39:27,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796690636] [2020-08-18 18:39:27,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 18:39:27,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 18:39:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:39:27,868 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-18 18:39:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:28,669 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-18 18:39:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 18:39:28,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-18 18:39:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:28,672 INFO L225 Difference]: With dead ends: 346 [2020-08-18 18:39:28,672 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 18:39:28,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:39:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 18:39:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-18 18:39:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 18:39:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-18 18:39:28,687 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-18 18:39:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:28,687 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-18 18:39:28,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 18:39:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-18 18:39:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 18:39:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:28,689 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:28,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 18:39:28,689 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:28,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-18 18:39:28,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:28,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083904143] [2020-08-18 18:39:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:28,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 18:39:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 18:39:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 18:39:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:29,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083904143] [2020-08-18 18:39:29,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:29,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 18:39:29,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006117439] [2020-08-18 18:39:29,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 18:39:29,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 18:39:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:39:29,028 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-18 18:39:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:29,308 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-18 18:39:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 18:39:29,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-18 18:39:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:29,312 INFO L225 Difference]: With dead ends: 431 [2020-08-18 18:39:29,312 INFO L226 Difference]: Without dead ends: 320 [2020-08-18 18:39:29,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:39:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-18 18:39:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-18 18:39:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-18 18:39:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-18 18:39:29,329 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-18 18:39:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:29,329 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-18 18:39:29,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 18:39:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-18 18:39:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 18:39:29,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:29,331 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:29,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 18:39:29,331 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-18 18:39:29,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:29,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762522450] [2020-08-18 18:39:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:39:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 18:39:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 18:39:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762522450] [2020-08-18 18:39:29,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:29,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 18:39:29,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507371139] [2020-08-18 18:39:29,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 18:39:29,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 18:39:29,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:39:29,868 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-18 18:39:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:30,702 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-18 18:39:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 18:39:30,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-18 18:39:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:30,707 INFO L225 Difference]: With dead ends: 358 [2020-08-18 18:39:30,707 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 18:39:30,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:39:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 18:39:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-18 18:39:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-18 18:39:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-18 18:39:30,723 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-18 18:39:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:30,723 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-18 18:39:30,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 18:39:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-18 18:39:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 18:39:30,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:30,724 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:30,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 18:39:30,725 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-18 18:39:30,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:30,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370782015] [2020-08-18 18:39:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:30,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:30,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 18:39:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 18:39:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:31,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370782015] [2020-08-18 18:39:31,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:31,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 18:39:31,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212853059] [2020-08-18 18:39:31,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 18:39:31,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 18:39:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:39:31,151 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-18 18:39:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:31,416 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-18 18:39:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 18:39:31,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 18:39:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:31,430 INFO L225 Difference]: With dead ends: 448 [2020-08-18 18:39:31,430 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 18:39:31,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:39:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 18:39:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-18 18:39:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 18:39:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-18 18:39:31,456 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-18 18:39:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:31,456 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-18 18:39:31,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 18:39:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-18 18:39:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 18:39:31,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:31,459 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:31,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 18:39:31,459 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-18 18:39:31,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:31,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392829918] [2020-08-18 18:39:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:31,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:32,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 18:39:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:32,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:39:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 18:39:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:32,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392829918] [2020-08-18 18:39:32,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:32,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 18:39:32,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142355141] [2020-08-18 18:39:32,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 18:39:32,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 18:39:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:39:32,068 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-18 18:39:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:32,980 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-18 18:39:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 18:39:32,982 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-18 18:39:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:32,985 INFO L225 Difference]: With dead ends: 370 [2020-08-18 18:39:32,985 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 18:39:32,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:39:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 18:39:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-18 18:39:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 18:39:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-18 18:39:33,006 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-18 18:39:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:33,006 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-18 18:39:33,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 18:39:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-18 18:39:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 18:39:33,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:33,008 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:33,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 18:39:33,008 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-18 18:39:33,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:33,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354749934] [2020-08-18 18:39:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 18:39:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 18:39:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 18:39:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:33,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354749934] [2020-08-18 18:39:33,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:33,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 18:39:33,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534948415] [2020-08-18 18:39:33,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 18:39:33,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 18:39:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 18:39:33,462 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-18 18:39:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:33,836 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-18 18:39:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 18:39:33,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-18 18:39:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:33,844 INFO L225 Difference]: With dead ends: 465 [2020-08-18 18:39:33,844 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 18:39:33,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:39:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 18:39:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-18 18:39:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-18 18:39:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-18 18:39:33,868 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-18 18:39:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:33,869 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-18 18:39:33,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 18:39:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-18 18:39:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-18 18:39:33,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:33,871 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:33,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 18:39:33,871 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-18 18:39:33,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:33,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538881390] [2020-08-18 18:39:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:33,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 18:39:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:34,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 18:39:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:34,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:39:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:34,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538881390] [2020-08-18 18:39:34,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:34,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 18:39:34,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849725478] [2020-08-18 18:39:34,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 18:39:34,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 18:39:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:39:34,533 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-18 18:39:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:35,670 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-18 18:39:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 18:39:35,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-18 18:39:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:35,673 INFO L225 Difference]: With dead ends: 382 [2020-08-18 18:39:35,673 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 18:39:35,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:39:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 18:39:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-18 18:39:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 18:39:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-18 18:39:35,707 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-18 18:39:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:35,707 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-18 18:39:35,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 18:39:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-18 18:39:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 18:39:35,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:35,712 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:35,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 18:39:35,712 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-18 18:39:35,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:35,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994588967] [2020-08-18 18:39:35,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:35,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:35,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 18:39:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 18:39:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 18:39:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:36,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994588967] [2020-08-18 18:39:36,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:36,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 18:39:36,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198797619] [2020-08-18 18:39:36,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 18:39:36,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 18:39:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:39:36,199 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-18 18:39:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:36,675 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-18 18:39:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 18:39:36,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-18 18:39:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:36,678 INFO L225 Difference]: With dead ends: 482 [2020-08-18 18:39:36,678 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 18:39:36,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:39:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 18:39:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-18 18:39:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-18 18:39:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-18 18:39:36,698 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-18 18:39:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:36,699 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-18 18:39:36,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 18:39:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-18 18:39:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 18:39:36,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:36,700 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:36,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 18:39:36,700 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-18 18:39:36,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:36,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888254768] [2020-08-18 18:39:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:37,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 18:39:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 18:39:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:37,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 18:39:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:37,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888254768] [2020-08-18 18:39:37,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:37,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 18:39:37,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235687956] [2020-08-18 18:39:37,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 18:39:37,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 18:39:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:39:37,398 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-18 18:39:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:38,641 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-18 18:39:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 18:39:38,645 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-18 18:39:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:38,647 INFO L225 Difference]: With dead ends: 394 [2020-08-18 18:39:38,647 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 18:39:38,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:39:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 18:39:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-18 18:39:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-18 18:39:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-18 18:39:38,667 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-18 18:39:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:38,667 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-18 18:39:38,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 18:39:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-18 18:39:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 18:39:38,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:38,669 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:38,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 18:39:38,669 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-18 18:39:38,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:38,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724458041] [2020-08-18 18:39:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:39:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 18:39:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 18:39:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:39,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724458041] [2020-08-18 18:39:39,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:39,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 18:39:39,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406232547] [2020-08-18 18:39:39,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 18:39:39,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:39,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 18:39:39,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:39:39,178 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-18 18:39:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:39,548 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-18 18:39:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 18:39:39,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-18 18:39:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:39,552 INFO L225 Difference]: With dead ends: 499 [2020-08-18 18:39:39,552 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 18:39:39,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:39:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 18:39:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-18 18:39:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-18 18:39:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-18 18:39:39,574 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-18 18:39:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:39,574 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-18 18:39:39,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 18:39:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-18 18:39:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 18:39:39,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:39,576 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:39,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 18:39:39,576 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:39,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:39,577 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-18 18:39:39,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:39,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591931494] [2020-08-18 18:39:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:39,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:39:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:40,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:39:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 18:39:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:40,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591931494] [2020-08-18 18:39:40,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:40,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 18:39:40,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920499447] [2020-08-18 18:39:40,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 18:39:40,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:40,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 18:39:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:39:40,293 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-18 18:39:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:41,632 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-18 18:39:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 18:39:41,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-18 18:39:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:41,648 INFO L225 Difference]: With dead ends: 406 [2020-08-18 18:39:41,648 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 18:39:41,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:39:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 18:39:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-18 18:39:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 18:39:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-18 18:39:41,667 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-18 18:39:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:41,667 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-18 18:39:41,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 18:39:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-18 18:39:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-18 18:39:41,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:41,669 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:41,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 18:39:41,669 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-18 18:39:41,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:41,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106138520] [2020-08-18 18:39:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:41,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 18:39:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 18:39:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 18:39:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:42,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106138520] [2020-08-18 18:39:42,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:42,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 18:39:42,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018650087] [2020-08-18 18:39:42,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 18:39:42,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 18:39:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:39:42,205 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-18 18:39:42,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:42,516 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-18 18:39:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 18:39:42,517 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-18 18:39:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:42,519 INFO L225 Difference]: With dead ends: 516 [2020-08-18 18:39:42,519 INFO L226 Difference]: Without dead ends: 390 [2020-08-18 18:39:42,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:39:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-18 18:39:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-18 18:39:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 18:39:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-18 18:39:42,539 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-18 18:39:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:42,540 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-18 18:39:42,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 18:39:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-18 18:39:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 18:39:42,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:42,541 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:42,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 18:39:42,542 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:42,542 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-18 18:39:42,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:42,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276768981] [2020-08-18 18:39:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:42,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 18:39:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:43,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 18:39:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:43,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 18:39:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:43,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276768981] [2020-08-18 18:39:43,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:43,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 18:39:43,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185640217] [2020-08-18 18:39:43,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 18:39:43,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:43,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 18:39:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:39:43,311 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-18 18:39:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:44,757 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-18 18:39:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 18:39:44,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-18 18:39:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:44,759 INFO L225 Difference]: With dead ends: 418 [2020-08-18 18:39:44,759 INFO L226 Difference]: Without dead ends: 295 [2020-08-18 18:39:44,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-18 18:39:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-18 18:39:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-18 18:39:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-18 18:39:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-18 18:39:44,780 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-18 18:39:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:44,781 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-18 18:39:44,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 18:39:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-18 18:39:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 18:39:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:44,783 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:44,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 18:39:44,783 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-18 18:39:44,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:44,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684673755] [2020-08-18 18:39:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:44,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:45,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 18:39:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:45,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:39:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:45,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 18:39:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 18:39:45,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684673755] [2020-08-18 18:39:45,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:45,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 18:39:45,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824020646] [2020-08-18 18:39:45,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 18:39:45,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 18:39:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 18:39:45,374 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-18 18:39:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:45,953 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-18 18:39:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 18:39:45,954 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-18 18:39:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:45,957 INFO L225 Difference]: With dead ends: 533 [2020-08-18 18:39:45,957 INFO L226 Difference]: Without dead ends: 404 [2020-08-18 18:39:45,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-18 18:39:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-18 18:39:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-18 18:39:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 18:39:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-18 18:39:45,979 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-18 18:39:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:45,979 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-18 18:39:45,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 18:39:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-18 18:39:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 18:39:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:45,981 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:45,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 18:39:45,981 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-18 18:39:45,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:45,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509134260] [2020-08-18 18:39:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:39:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 18:39:46,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509134260] [2020-08-18 18:39:46,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:46,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:39:46,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105551665] [2020-08-18 18:39:46,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:39:46,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:39:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:46,163 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-18 18:39:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:46,557 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-18 18:39:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:46,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 18:39:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:46,563 INFO L225 Difference]: With dead ends: 271 [2020-08-18 18:39:46,563 INFO L226 Difference]: Without dead ends: 261 [2020-08-18 18:39:46,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-18 18:39:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-18 18:39:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 18:39:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-18 18:39:46,596 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-18 18:39:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:46,597 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-18 18:39:46,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:39:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-18 18:39:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 18:39:46,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:46,600 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:46,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 18:39:46,600 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-18 18:39:46,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:46,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184786830] [2020-08-18 18:39:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:39:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 18:39:46,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184786830] [2020-08-18 18:39:46,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:46,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:39:46,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557919006] [2020-08-18 18:39:46,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:39:46,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:46,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:39:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:46,914 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-18 18:39:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:47,125 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-18 18:39:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:47,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 18:39:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:47,131 INFO L225 Difference]: With dead ends: 285 [2020-08-18 18:39:47,131 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 18:39:47,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:39:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 18:39:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-18 18:39:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 18:39:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-18 18:39:47,175 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-18 18:39:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:47,175 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-18 18:39:47,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:39:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-18 18:39:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 18:39:47,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:47,178 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:47,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-18 18:39:47,178 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-18 18:39:47,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:47,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722074544] [2020-08-18 18:39:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:39:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-18 18:39:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722074544] [2020-08-18 18:39:47,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:47,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:39:47,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312130670] [2020-08-18 18:39:47,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:39:47,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:39:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:39:47,310 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-18 18:39:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:47,365 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-18 18:39:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:39:47,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-18 18:39:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:47,368 INFO L225 Difference]: With dead ends: 271 [2020-08-18 18:39:47,368 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 18:39:47,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 18:39:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-18 18:39:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 18:39:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-18 18:39:47,409 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-18 18:39:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:47,410 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-18 18:39:47,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:39:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-18 18:39:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 18:39:47,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:47,413 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:47,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-18 18:39:47,413 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-18 18:39:47,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:47,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592215984] [2020-08-18 18:39:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:39:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 18:39:47,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592215984] [2020-08-18 18:39:47,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:47,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:39:47,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846364641] [2020-08-18 18:39:47,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:39:47,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:39:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:47,758 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-18 18:39:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:48,006 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-18 18:39:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:48,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-18 18:39:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:48,009 INFO L225 Difference]: With dead ends: 284 [2020-08-18 18:39:48,010 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 18:39:48,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-18 18:39:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 18:39:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-18 18:39:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-18 18:39:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-18 18:39:48,044 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-18 18:39:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:48,044 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-18 18:39:48,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:39:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-18 18:39:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 18:39:48,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:48,047 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:48,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-18 18:39:48,047 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:48,047 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-18 18:39:48,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:48,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987915350] [2020-08-18 18:39:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 18:39:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 18:39:48,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987915350] [2020-08-18 18:39:48,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:48,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:39:48,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295658652] [2020-08-18 18:39:48,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:39:48,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:48,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:39:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:48,238 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-18 18:39:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:48,384 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-18 18:39:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:39:48,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-18 18:39:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:48,388 INFO L225 Difference]: With dead ends: 303 [2020-08-18 18:39:48,388 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 18:39:48,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 18:39:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-18 18:39:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-18 18:39:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-18 18:39:48,424 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-18 18:39:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:48,424 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-18 18:39:48,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:39:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-18 18:39:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 18:39:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:48,426 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:48,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-18 18:39:48,427 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-18 18:39:48,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:48,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125925670] [2020-08-18 18:39:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 18:39:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 18:39:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 18:39:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:39:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 18:39:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125925670] [2020-08-18 18:39:48,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:48,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:39:48,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298685486] [2020-08-18 18:39:48,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:39:48,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:39:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:48,554 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-18 18:39:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:48,657 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-18 18:39:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:39:48,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-18 18:39:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:48,660 INFO L225 Difference]: With dead ends: 409 [2020-08-18 18:39:48,660 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 18:39:48,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:39:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 18:39:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-18 18:39:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 18:39:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 18:39:48,683 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-18 18:39:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:48,684 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 18:39:48,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:39:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 18:39:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 18:39:48,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:48,685 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:48,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-18 18:39:48,686 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:48,686 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-18 18:39:48,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:48,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37441457] [2020-08-18 18:39:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:39:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-18 18:39:48,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37441457] [2020-08-18 18:39:48,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:39:48,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:39:48,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440133853] [2020-08-18 18:39:48,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:39:48,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:39:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:48,873 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-18 18:39:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:49,003 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-18 18:39:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:39:49,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-18 18:39:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:49,005 INFO L225 Difference]: With dead ends: 158 [2020-08-18 18:39:49,005 INFO L226 Difference]: Without dead ends: 143 [2020-08-18 18:39:49,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:39:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-18 18:39:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-18 18:39:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 18:39:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 18:39:49,028 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-18 18:39:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:49,028 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 18:39:49,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:39:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 18:39:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 18:39:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:49,030 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:49,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-18 18:39:49,030 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-18 18:39:49,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:49,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515306082] [2020-08-18 18:39:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:39:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-18 18:39:49,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515306082] [2020-08-18 18:39:49,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:49,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:39:49,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973113397] [2020-08-18 18:39:49,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:39:49,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:39:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:49,209 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-18 18:39:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:49,332 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 18:39:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:39:49,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 18:39:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:49,334 INFO L225 Difference]: With dead ends: 176 [2020-08-18 18:39:49,334 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 18:39:49,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:39:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 18:39:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-18 18:39:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 18:39:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-18 18:39:49,362 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-18 18:39:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:49,362 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-18 18:39:49,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:39:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-18 18:39:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 18:39:49,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:49,364 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:49,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-18 18:39:49,364 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-18 18:39:49,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:49,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525674360] [2020-08-18 18:39:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 18:39:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 18:39:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-18 18:39:49,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525674360] [2020-08-18 18:39:49,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:49,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:39:49,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501186289] [2020-08-18 18:39:49,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:39:49,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:39:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:49,548 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-18 18:39:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:49,749 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-18 18:39:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:39:49,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 18:39:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:49,752 INFO L225 Difference]: With dead ends: 170 [2020-08-18 18:39:49,752 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 18:39:49,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:39:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 18:39:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-18 18:39:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 18:39:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-18 18:39:49,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-18 18:39:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:49,773 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-18 18:39:49,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:39:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-18 18:39:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 18:39:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:49,774 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:49,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-18 18:39:49,775 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-18 18:39:49,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:49,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424460179] [2020-08-18 18:39:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 18:39:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 18:39:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 18:39:49,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424460179] [2020-08-18 18:39:49,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:49,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:39:49,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922136753] [2020-08-18 18:39:49,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:39:49,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:49,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:39:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:39:49,932 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-18 18:39:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:50,027 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-18 18:39:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:39:50,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-18 18:39:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:50,030 INFO L225 Difference]: With dead ends: 173 [2020-08-18 18:39:50,030 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 18:39:50,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 18:39:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-18 18:39:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 18:39:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-18 18:39:50,050 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-18 18:39:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:50,051 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-18 18:39:50,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:39:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-18 18:39:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 18:39:50,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:39:50,052 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:39:50,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-18 18:39:50,052 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:39:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:39:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-18 18:39:50,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:39:50,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518054453] [2020-08-18 18:39:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:39:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:39:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:39:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:39:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 18:39:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 18:39:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 18:39:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:39:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 18:39:50,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518054453] [2020-08-18 18:39:50,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:39:50,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 18:39:50,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726225113] [2020-08-18 18:39:50,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:39:50,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:39:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:39:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:39:50,274 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-18 18:39:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:39:50,399 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-18 18:39:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:39:50,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 18:39:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:39:50,400 INFO L225 Difference]: With dead ends: 157 [2020-08-18 18:39:50,400 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:39:50,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:39:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:39:50,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:39:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:39:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:39:50,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-18 18:39:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:39:50,402 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:39:50,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:39:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:39:50,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:39:50,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-18 18:39:50,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:39:56,330 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 558 DAG size of output: 226 [2020-08-18 18:39:57,842 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 393 DAG size of output: 20 [2020-08-18 18:39:58,131 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136