/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:56:43,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:56:43,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:56:43,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:56:43,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:56:43,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:56:43,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:56:43,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:56:43,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:56:43,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:56:43,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:56:43,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:56:43,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:56:43,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:56:43,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:56:43,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:56:43,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:56:43,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:56:43,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:56:43,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:56:43,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:56:43,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:56:43,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:56:43,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:56:43,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:56:43,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:56:43,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:56:43,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:56:43,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:56:43,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:56:43,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:56:43,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:56:43,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:56:43,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:56:43,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:56:43,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:56:43,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:56:43,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:56:43,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:56:43,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:56:43,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:56:43,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:56:43,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:56:43,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:56:43,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:56:43,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:56:43,981 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:56:43,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:56:43,982 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:56:43,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:56:43,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:56:43,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:56:43,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:56:43,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:56:43,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:56:43,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:56:43,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:56:43,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:56:43,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:56:43,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:56:43,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:56:43,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:56:43,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:56:43,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:56:43,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:56:43,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:56:43,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:56:44,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:56:44,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:56:44,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:56:44,316 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:56:44,316 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:56:44,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-21 22:56:44,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f395adb9/7aeb093991a84c0281982346b76d16b9/FLAG270a4c6f4 [2020-08-21 22:56:44,860 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:56:44,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-21 22:56:44,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f395adb9/7aeb093991a84c0281982346b76d16b9/FLAG270a4c6f4 [2020-08-21 22:56:45,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f395adb9/7aeb093991a84c0281982346b76d16b9 [2020-08-21 22:56:45,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:56:45,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:56:45,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:56:45,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:56:45,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:56:45,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da42254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45, skipping insertion in model container [2020-08-21 22:56:45,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:56:45,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:56:45,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:56:45,608 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:56:45,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:56:45,747 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:56:45,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45 WrapperNode [2020-08-21 22:56:45,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:56:45,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:56:45,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:56:45,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:56:45,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... [2020-08-21 22:56:45,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:56:45,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:56:45,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:56:45,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:56:45,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:56:45,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-21 22:56:45,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:56:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:56:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-21 22:56:45,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:56:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:56:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:56:46,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:56:46,300 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 22:56:46,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:56:46 BoogieIcfgContainer [2020-08-21 22:56:46,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:56:46,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:56:46,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:56:46,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:56:46,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:56:45" (1/3) ... [2020-08-21 22:56:46,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2644b197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:56:46, skipping insertion in model container [2020-08-21 22:56:46,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:56:45" (2/3) ... [2020-08-21 22:56:46,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2644b197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:56:46, skipping insertion in model container [2020-08-21 22:56:46,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:56:46" (3/3) ... [2020-08-21 22:56:46,313 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-21 22:56:46,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:56:46,333 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:56:46,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:56:46,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:56:46,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:56:46,376 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:56:46,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:56:46,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:56:46,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:56:46,377 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:56:46,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:56:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-21 22:56:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 22:56:46,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:46,403 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] [2020-08-21 22:56:46,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-21 22:56:46,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:46,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532429878] [2020-08-21 22:56:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 22:56:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 22:56:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 22:56:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:46,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532429878] [2020-08-21 22:56:46,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:46,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 22:56:46,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417487920] [2020-08-21 22:56:46,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:56:46,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:46,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:56:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:56:46,819 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-21 22:56:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:46,977 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-21 22:56:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:56:46,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-21 22:56:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:46,992 INFO L225 Difference]: With dead ends: 136 [2020-08-21 22:56:46,992 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 22:56:46,996 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 [2020-08-21 22:56:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 22:56:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-21 22:56:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 22:56:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-21 22:56:47,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-21 22:56:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:47,056 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-21 22:56:47,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:56:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-21 22:56:47,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 22:56:47,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:47,060 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] [2020-08-21 22:56:47,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:56:47,060 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-21 22:56:47,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:47,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150693534] [2020-08-21 22:56:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:56:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 22:56:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:56:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:47,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150693534] [2020-08-21 22:56:47,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:47,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 22:56:47,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325103233] [2020-08-21 22:56:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:56:47,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:56:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:56:47,194 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-21 22:56:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:47,285 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-21 22:56:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 22:56:47,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 22:56:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:47,289 INFO L225 Difference]: With dead ends: 129 [2020-08-21 22:56:47,289 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 22:56:47,291 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 [2020-08-21 22:56:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 22:56:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-21 22:56:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 22:56:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-21 22:56:47,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-21 22:56:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:47,311 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-21 22:56:47,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:56:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-21 22:56:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 22:56:47,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:47,315 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] [2020-08-21 22:56:47,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:56:47,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-21 22:56:47,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:47,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553179762] [2020-08-21 22:56:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 22:56:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 22:56:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:56:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:47,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553179762] [2020-08-21 22:56:47,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:47,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:56:47,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126131868] [2020-08-21 22:56:47,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:56:47,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:56:47,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:56:47,521 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-21 22:56:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:47,629 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-21 22:56:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:56:47,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-21 22:56:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:47,633 INFO L225 Difference]: With dead ends: 145 [2020-08-21 22:56:47,634 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 22:56:47,635 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 [2020-08-21 22:56:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 22:56:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-21 22:56:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 22:56:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-21 22:56:47,650 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-21 22:56:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:47,651 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-21 22:56:47,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:56:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-21 22:56:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 22:56:47,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:47,654 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] [2020-08-21 22:56:47,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:56:47,654 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-21 22:56:47,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:47,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132082350] [2020-08-21 22:56:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 22:56:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 22:56:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:56:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132082350] [2020-08-21 22:56:47,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:47,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:56:47,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573353590] [2020-08-21 22:56:47,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:56:47,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:56:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:56:47,811 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-21 22:56:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:47,912 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-21 22:56:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:56:47,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-21 22:56:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:47,915 INFO L225 Difference]: With dead ends: 156 [2020-08-21 22:56:47,915 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 22:56:47,917 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 [2020-08-21 22:56:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 22:56:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-21 22:56:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 22:56:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-21 22:56:47,931 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-21 22:56:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:47,932 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-21 22:56:47,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:56:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-21 22:56:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 22:56:47,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:47,935 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] [2020-08-21 22:56:47,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:56:47,936 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-21 22:56:47,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:47,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661831954] [2020-08-21 22:56:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:47,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:56:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 22:56:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:56:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:48,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661831954] [2020-08-21 22:56:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:48,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:56:48,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462376036] [2020-08-21 22:56:48,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:56:48,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:56:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:56:48,088 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-21 22:56:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:48,209 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-21 22:56:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:56:48,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-21 22:56:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:48,212 INFO L225 Difference]: With dead ends: 166 [2020-08-21 22:56:48,212 INFO L226 Difference]: Without dead ends: 106 [2020-08-21 22:56:48,213 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 [2020-08-21 22:56:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-21 22:56:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-21 22:56:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 22:56:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-21 22:56:48,228 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-21 22:56:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:48,228 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-21 22:56:48,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:56:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-21 22:56:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 22:56:48,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:48,232 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] [2020-08-21 22:56:48,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:56:48,232 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-21 22:56:48,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:48,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609992390] [2020-08-21 22:56:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:56:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 22:56:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:56:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:48,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609992390] [2020-08-21 22:56:48,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:48,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:56:48,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740490380] [2020-08-21 22:56:48,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:56:48,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:48,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:56:48,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:56:48,386 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-21 22:56:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:48,485 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-21 22:56:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:56:48,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 22:56:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:48,487 INFO L225 Difference]: With dead ends: 176 [2020-08-21 22:56:48,487 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 22:56:48,488 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 [2020-08-21 22:56:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 22:56:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-21 22:56:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 22:56:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-21 22:56:48,507 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-21 22:56:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:48,508 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-21 22:56:48,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:56:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-21 22:56:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 22:56:48,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:48,510 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] [2020-08-21 22:56:48,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:56:48,510 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-21 22:56:48,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:48,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094310905] [2020-08-21 22:56:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 22:56:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:56:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 22:56:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:48,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094310905] [2020-08-21 22:56:48,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:48,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:56:48,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377002432] [2020-08-21 22:56:48,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:56:48,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:56:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:56:48,652 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-21 22:56:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:48,785 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-21 22:56:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:56:48,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-21 22:56:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:48,787 INFO L225 Difference]: With dead ends: 178 [2020-08-21 22:56:48,788 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 22:56:48,788 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 [2020-08-21 22:56:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 22:56:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-21 22:56:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 22:56:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-21 22:56:48,801 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-21 22:56:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:48,802 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-21 22:56:48,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:56:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-21 22:56:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 22:56:48,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:48,803 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] [2020-08-21 22:56:48,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:56:48,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:48,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-21 22:56:48,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:48,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355588639] [2020-08-21 22:56:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 22:56:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 22:56:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 22:56:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:48,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355588639] [2020-08-21 22:56:48,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:48,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:56:48,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107275975] [2020-08-21 22:56:48,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:56:48,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:56:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:56:48,906 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-21 22:56:48,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:48,994 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-21 22:56:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:56:48,994 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-21 22:56:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:48,996 INFO L225 Difference]: With dead ends: 193 [2020-08-21 22:56:48,996 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 22:56:48,997 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 [2020-08-21 22:56:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 22:56:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-21 22:56:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 22:56:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-21 22:56:49,008 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-21 22:56:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:49,009 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-21 22:56:49,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:56:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-21 22:56:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 22:56:49,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:49,010 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] [2020-08-21 22:56:49,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:56:49,011 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-21 22:56:49,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:49,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206708489] [2020-08-21 22:56:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 22:56:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:56:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 22:56:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:49,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206708489] [2020-08-21 22:56:49,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:49,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:56:49,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120181667] [2020-08-21 22:56:49,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:56:49,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:56:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:56:49,194 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-21 22:56:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:49,378 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-21 22:56:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:56:49,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-21 22:56:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:49,381 INFO L225 Difference]: With dead ends: 190 [2020-08-21 22:56:49,381 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 22:56:49,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:56:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 22:56:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-21 22:56:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 22:56:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-21 22:56:49,392 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-21 22:56:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:49,393 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-21 22:56:49,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:56:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-21 22:56:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 22:56:49,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:49,394 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] [2020-08-21 22:56:49,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:56:49,395 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-21 22:56:49,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:49,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452867129] [2020-08-21 22:56:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 22:56:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 22:56:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:56:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:49,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452867129] [2020-08-21 22:56:49,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:49,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:56:49,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756099153] [2020-08-21 22:56:49,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:56:49,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:56:49,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:56:49,502 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-21 22:56:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:49,615 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-21 22:56:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:56:49,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 22:56:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:49,622 INFO L225 Difference]: With dead ends: 210 [2020-08-21 22:56:49,622 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 22:56:49,623 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 [2020-08-21 22:56:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 22:56:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-21 22:56:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 22:56:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-21 22:56:49,640 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-21 22:56:49,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:49,640 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-21 22:56:49,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:56:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-21 22:56:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 22:56:49,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:49,642 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] [2020-08-21 22:56:49,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:56:49,643 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-21 22:56:49,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:49,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193579614] [2020-08-21 22:56:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 22:56:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:56:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 22:56:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:49,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193579614] [2020-08-21 22:56:49,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:49,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:56:49,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478968228] [2020-08-21 22:56:49,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:56:49,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:56:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:56:49,828 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-21 22:56:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:49,956 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-21 22:56:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:56:49,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-21 22:56:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:49,958 INFO L225 Difference]: With dead ends: 202 [2020-08-21 22:56:49,958 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 22:56:49,959 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 [2020-08-21 22:56:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 22:56:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-21 22:56:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-21 22:56:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-21 22:56:49,969 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-21 22:56:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:49,969 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-21 22:56:49,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:56:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-21 22:56:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 22:56:49,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:49,970 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] [2020-08-21 22:56:49,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:56:49,971 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-21 22:56:49,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:49,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340689531] [2020-08-21 22:56:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:49,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:56:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 22:56:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 22:56:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:50,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340689531] [2020-08-21 22:56:50,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:50,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:56:50,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800249901] [2020-08-21 22:56:50,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:56:50,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:56:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:56:50,092 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-21 22:56:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:50,210 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-21 22:56:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:56:50,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 22:56:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:50,212 INFO L225 Difference]: With dead ends: 227 [2020-08-21 22:56:50,213 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 22:56:50,214 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 [2020-08-21 22:56:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 22:56:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-21 22:56:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 22:56:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-21 22:56:50,224 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-21 22:56:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:50,225 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-21 22:56:50,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:56:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-21 22:56:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 22:56:50,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:50,226 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] [2020-08-21 22:56:50,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:56:50,227 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-21 22:56:50,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:50,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281223274] [2020-08-21 22:56:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:56:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 22:56:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 22:56:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:50,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281223274] [2020-08-21 22:56:50,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:50,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:56:50,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309136374] [2020-08-21 22:56:50,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:56:50,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:56:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:56:50,436 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-21 22:56:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:50,674 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-21 22:56:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:56:50,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-21 22:56:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:50,677 INFO L225 Difference]: With dead ends: 214 [2020-08-21 22:56:50,677 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 22:56:50,678 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 [2020-08-21 22:56:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 22:56:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-21 22:56:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 22:56:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-21 22:56:50,689 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-21 22:56:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:50,689 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-21 22:56:50,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:56:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-21 22:56:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 22:56:50,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:50,691 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] [2020-08-21 22:56:50,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:56:50,691 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-21 22:56:50,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:50,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872809788] [2020-08-21 22:56:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 22:56:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 22:56:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 22:56:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:50,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872809788] [2020-08-21 22:56:50,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:50,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:56:50,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263598304] [2020-08-21 22:56:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:56:50,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:56:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:56:50,820 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-21 22:56:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:50,955 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-21 22:56:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:56:50,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-21 22:56:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:50,958 INFO L225 Difference]: With dead ends: 244 [2020-08-21 22:56:50,958 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 22:56:50,959 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 [2020-08-21 22:56:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 22:56:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-21 22:56:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 22:56:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-21 22:56:50,974 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-21 22:56:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:50,974 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-21 22:56:50,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:56:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-21 22:56:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 22:56:50,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:50,976 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] [2020-08-21 22:56:50,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:56:50,977 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-21 22:56:50,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:50,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996048211] [2020-08-21 22:56:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:56:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:56:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 22:56:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:51,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996048211] [2020-08-21 22:56:51,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:51,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:56:51,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409420374] [2020-08-21 22:56:51,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:56:51,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:56:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:56:51,248 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-21 22:56:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:51,494 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-21 22:56:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:56:51,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-21 22:56:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:51,496 INFO L225 Difference]: With dead ends: 226 [2020-08-21 22:56:51,496 INFO L226 Difference]: Without dead ends: 151 [2020-08-21 22:56:51,499 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 [2020-08-21 22:56:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-21 22:56:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-21 22:56:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 22:56:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-21 22:56:51,515 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-21 22:56:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:51,516 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-21 22:56:51,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:56:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-21 22:56:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 22:56:51,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:51,517 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] [2020-08-21 22:56:51,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:56:51,518 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-21 22:56:51,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:51,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930545588] [2020-08-21 22:56:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 22:56:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 22:56:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 22:56:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:51,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930545588] [2020-08-21 22:56:51,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:51,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:56:51,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023263964] [2020-08-21 22:56:51,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:56:51,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:56:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:56:51,709 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-21 22:56:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:51,856 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-21 22:56:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:56:51,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-21 22:56:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:51,858 INFO L225 Difference]: With dead ends: 261 [2020-08-21 22:56:51,858 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 22:56:51,859 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 [2020-08-21 22:56:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 22:56:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-21 22:56:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 22:56:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-21 22:56:51,870 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-21 22:56:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:51,871 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-21 22:56:51,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:56:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-21 22:56:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 22:56:51,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:51,872 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] [2020-08-21 22:56:51,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:56:51,873 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-21 22:56:51,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:51,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68512366] [2020-08-21 22:56:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:51,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 22:56:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 22:56:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 22:56:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:52,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68512366] [2020-08-21 22:56:52,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:52,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:56:52,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870040574] [2020-08-21 22:56:52,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:56:52,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:56:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:56:52,137 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-21 22:56:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:52,420 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-21 22:56:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:56:52,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-21 22:56:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:52,423 INFO L225 Difference]: With dead ends: 238 [2020-08-21 22:56:52,423 INFO L226 Difference]: Without dead ends: 160 [2020-08-21 22:56:52,424 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 [2020-08-21 22:56:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-21 22:56:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-21 22:56:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 22:56:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-21 22:56:52,435 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-21 22:56:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:52,435 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-21 22:56:52,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:56:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-21 22:56:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 22:56:52,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:52,437 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] [2020-08-21 22:56:52,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:56:52,437 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-21 22:56:52,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:52,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542699035] [2020-08-21 22:56:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 22:56:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 22:56:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 22:56:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:52,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542699035] [2020-08-21 22:56:52,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:52,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:56:52,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991402678] [2020-08-21 22:56:52,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:56:52,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:56:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:56:52,599 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-21 22:56:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:52,751 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-21 22:56:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:56:52,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-21 22:56:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:52,754 INFO L225 Difference]: With dead ends: 278 [2020-08-21 22:56:52,754 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 22:56:52,755 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 [2020-08-21 22:56:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 22:56:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-21 22:56:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 22:56:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-21 22:56:52,767 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-21 22:56:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:52,767 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-21 22:56:52,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:56:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-21 22:56:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 22:56:52,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:52,774 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] [2020-08-21 22:56:52,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:56:52,775 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:52,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-21 22:56:52,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:52,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905847263] [2020-08-21 22:56:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:52,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 22:56:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 22:56:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 22:56:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:53,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905847263] [2020-08-21 22:56:53,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:53,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:56:53,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22926555] [2020-08-21 22:56:53,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:56:53,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:53,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:56:53,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:56:53,040 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-21 22:56:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:53,278 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-21 22:56:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:56:53,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-21 22:56:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:53,280 INFO L225 Difference]: With dead ends: 250 [2020-08-21 22:56:53,280 INFO L226 Difference]: Without dead ends: 169 [2020-08-21 22:56:53,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:56:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-21 22:56:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-21 22:56:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 22:56:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-21 22:56:53,292 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-21 22:56:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:53,292 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-21 22:56:53,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:56:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-21 22:56:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 22:56:53,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:53,294 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] [2020-08-21 22:56:53,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:56:53,294 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-21 22:56:53,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:53,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255552601] [2020-08-21 22:56:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 22:56:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 22:56:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:56:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:53,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255552601] [2020-08-21 22:56:53,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:53,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:56:53,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328717475] [2020-08-21 22:56:53,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:56:53,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:53,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:56:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:56:53,527 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-21 22:56:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:53,723 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-21 22:56:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:56:53,724 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-21 22:56:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:53,727 INFO L225 Difference]: With dead ends: 295 [2020-08-21 22:56:53,727 INFO L226 Difference]: Without dead ends: 208 [2020-08-21 22:56:53,729 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 [2020-08-21 22:56:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-21 22:56:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-21 22:56:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 22:56:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-21 22:56:53,748 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-21 22:56:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:53,749 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-21 22:56:53,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:56:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-21 22:56:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 22:56:53,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:53,751 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] [2020-08-21 22:56:53,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:56:53,752 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-21 22:56:53,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:53,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083059335] [2020-08-21 22:56:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 22:56:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 22:56:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 22:56:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:54,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083059335] [2020-08-21 22:56:54,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:54,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:56:54,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428161451] [2020-08-21 22:56:54,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:56:54,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:56:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:56:54,062 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-21 22:56:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:54,435 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-21 22:56:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:56:54,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-21 22:56:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:54,438 INFO L225 Difference]: With dead ends: 262 [2020-08-21 22:56:54,438 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 22:56:54,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:56:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 22:56:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-21 22:56:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 22:56:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-21 22:56:54,452 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-21 22:56:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:54,452 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-21 22:56:54,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:56:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-21 22:56:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 22:56:54,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:54,454 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] [2020-08-21 22:56:54,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:56:54,456 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-21 22:56:54,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:54,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209369875] [2020-08-21 22:56:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 22:56:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 22:56:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 22:56:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:54,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209369875] [2020-08-21 22:56:54,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:54,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:56:54,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875482426] [2020-08-21 22:56:54,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:56:54,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:56:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:56:54,682 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-21 22:56:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:54,864 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-21 22:56:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:56:54,864 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-21 22:56:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:54,866 INFO L225 Difference]: With dead ends: 312 [2020-08-21 22:56:54,866 INFO L226 Difference]: Without dead ends: 222 [2020-08-21 22:56:54,867 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 [2020-08-21 22:56:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-21 22:56:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-21 22:56:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 22:56:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-21 22:56:54,880 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-21 22:56:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:54,880 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-21 22:56:54,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:56:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-21 22:56:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 22:56:54,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:54,881 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] [2020-08-21 22:56:54,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:56:54,882 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-21 22:56:54,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:54,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672513596] [2020-08-21 22:56:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:54,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 22:56:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 22:56:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 22:56:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:55,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672513596] [2020-08-21 22:56:55,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:55,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:56:55,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287656373] [2020-08-21 22:56:55,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:56:55,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:56:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:56:55,206 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-21 22:56:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:55,641 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-21 22:56:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:56:55,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-21 22:56:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:55,644 INFO L225 Difference]: With dead ends: 274 [2020-08-21 22:56:55,644 INFO L226 Difference]: Without dead ends: 187 [2020-08-21 22:56:55,645 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 [2020-08-21 22:56:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-21 22:56:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-21 22:56:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 22:56:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-21 22:56:55,662 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-21 22:56:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:55,662 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-21 22:56:55,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:56:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-21 22:56:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 22:56:55,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:55,664 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] [2020-08-21 22:56:55,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:56:55,665 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-21 22:56:55,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:55,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550294881] [2020-08-21 22:56:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 22:56:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 22:56:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 22:56:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:55,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550294881] [2020-08-21 22:56:55,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:55,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:56:55,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541285249] [2020-08-21 22:56:55,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:56:55,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:56:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:56:55,930 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-21 22:56:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:56,140 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-21 22:56:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:56:56,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-21 22:56:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:56,143 INFO L225 Difference]: With dead ends: 329 [2020-08-21 22:56:56,143 INFO L226 Difference]: Without dead ends: 236 [2020-08-21 22:56:56,144 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 [2020-08-21 22:56:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-21 22:56:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-21 22:56:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-21 22:56:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-21 22:56:56,157 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-21 22:56:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:56,158 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-21 22:56:56,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:56:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-21 22:56:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 22:56:56,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:56,159 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] [2020-08-21 22:56:56,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:56:56,162 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-21 22:56:56,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:56,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424116622] [2020-08-21 22:56:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 22:56:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:56:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 22:56:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:56,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424116622] [2020-08-21 22:56:56,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:56,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 22:56:56,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076871448] [2020-08-21 22:56:56,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 22:56:56,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 22:56:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:56:56,565 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-21 22:56:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:56,996 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-21 22:56:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:56:56,996 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-21 22:56:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:56,998 INFO L225 Difference]: With dead ends: 286 [2020-08-21 22:56:56,998 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 22:56:56,999 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 [2020-08-21 22:56:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 22:56:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-21 22:56:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-21 22:56:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-21 22:56:57,013 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-21 22:56:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:57,014 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-21 22:56:57,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 22:56:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-21 22:56:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 22:56:57,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:57,015 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] [2020-08-21 22:56:57,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 22:56:57,016 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-21 22:56:57,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:57,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393075129] [2020-08-21 22:56:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 22:56:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 22:56:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 22:56:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:57,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393075129] [2020-08-21 22:56:57,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:57,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 22:56:57,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516582931] [2020-08-21 22:56:57,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 22:56:57,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 22:56:57,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:56:57,304 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-21 22:56:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:57,532 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-21 22:56:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:56:57,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-21 22:56:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:57,534 INFO L225 Difference]: With dead ends: 346 [2020-08-21 22:56:57,534 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 22:56:57,535 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 [2020-08-21 22:56:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 22:56:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-21 22:56:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 22:56:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-21 22:56:57,549 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-21 22:56:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:57,549 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-21 22:56:57,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 22:56:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-21 22:56:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 22:56:57,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:57,551 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] [2020-08-21 22:56:57,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 22:56:57,551 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-21 22:56:57,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:57,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057282917] [2020-08-21 22:56:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 22:56:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 22:56:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 22:56:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 22:56:57,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057282917] [2020-08-21 22:56:57,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:57,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:56:57,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910867941] [2020-08-21 22:56:57,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:56:57,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:57,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:56:57,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:56:57,618 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-21 22:56:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:57,631 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-21 22:56:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:56:57,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-21 22:56:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:57,633 INFO L225 Difference]: With dead ends: 160 [2020-08-21 22:56:57,633 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 22:56:57,634 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 [2020-08-21 22:56:57,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 22:56:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 22:56:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 22:56:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-21 22:56:57,646 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-21 22:56:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:57,647 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-21 22:56:57,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:56:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-21 22:56:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 22:56:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:57,648 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] [2020-08-21 22:56:57,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 22:56:57,649 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-21 22:56:57,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:57,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745848844] [2020-08-21 22:56:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 22:56:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 22:56:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 22:56:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 22:56:57,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745848844] [2020-08-21 22:56:57,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:56:57,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:56:57,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672114357] [2020-08-21 22:56:57,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:56:57,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:56:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:56:57,723 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-21 22:56:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:57,748 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-21 22:56:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 22:56:57,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-21 22:56:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:57,750 INFO L225 Difference]: With dead ends: 161 [2020-08-21 22:56:57,751 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 22:56:57,751 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 [2020-08-21 22:56:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 22:56:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 22:56:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 22:56:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-21 22:56:57,766 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-21 22:56:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:57,766 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-21 22:56:57,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:56:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-21 22:56:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 22:56:57,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:57,768 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] [2020-08-21 22:56:57,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 22:56:57,768 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-21 22:56:57,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:57,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313742701] [2020-08-21 22:56:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 22:56:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 22:56:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 22:56:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:58,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313742701] [2020-08-21 22:56:58,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:58,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:56:58,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049294832] [2020-08-21 22:56:58,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:56:58,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:56:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:56:58,147 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-21 22:56:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:58,664 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-21 22:56:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:56:58,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-21 22:56:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:58,667 INFO L225 Difference]: With dead ends: 298 [2020-08-21 22:56:58,667 INFO L226 Difference]: Without dead ends: 205 [2020-08-21 22:56:58,669 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 [2020-08-21 22:56:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-21 22:56:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-21 22:56:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-21 22:56:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-21 22:56:58,688 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-21 22:56:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:58,689 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-21 22:56:58,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:56:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-21 22:56:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 22:56:58,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:58,691 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] [2020-08-21 22:56:58,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 22:56:58,691 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-21 22:56:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:58,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425197264] [2020-08-21 22:56:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:58,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 22:56:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 22:56:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 22:56:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:59,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425197264] [2020-08-21 22:56:59,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:59,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:56:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429421789] [2020-08-21 22:56:59,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:56:59,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:56:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:56:59,049 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-21 22:56:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:56:59,281 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-21 22:56:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:56:59,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-21 22:56:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:56:59,285 INFO L225 Difference]: With dead ends: 363 [2020-08-21 22:56:59,285 INFO L226 Difference]: Without dead ends: 264 [2020-08-21 22:56:59,287 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 [2020-08-21 22:56:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-21 22:56:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-21 22:56:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 22:56:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-21 22:56:59,305 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-21 22:56:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:56:59,305 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-21 22:56:59,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:56:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-21 22:56:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 22:56:59,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:56:59,307 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] [2020-08-21 22:56:59,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 22:56:59,307 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:56:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:56:59,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-21 22:56:59,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:56:59,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040229703] [2020-08-21 22:56:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:56:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:56:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:56:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:56:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 22:56:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 22:56:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 22:56:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:56:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:56:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040229703] [2020-08-21 22:56:59,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:56:59,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 22:56:59,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706614791] [2020-08-21 22:56:59,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 22:56:59,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:56:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 22:56:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:56:59,701 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-21 22:57:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:00,312 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-21 22:57:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:57:00,316 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-21 22:57:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:00,317 INFO L225 Difference]: With dead ends: 310 [2020-08-21 22:57:00,317 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 22:57:00,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:57:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 22:57:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-21 22:57:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 22:57:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-21 22:57:00,331 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-21 22:57:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:00,332 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-21 22:57:00,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 22:57:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-21 22:57:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-21 22:57:00,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:00,333 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] [2020-08-21 22:57:00,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 22:57:00,334 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-21 22:57:00,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:00,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665140710] [2020-08-21 22:57:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:57:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 22:57:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 22:57:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:00,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665140710] [2020-08-21 22:57:00,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:00,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 22:57:00,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071471624] [2020-08-21 22:57:00,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 22:57:00,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 22:57:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:57:00,624 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-21 22:57:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:00,909 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-21 22:57:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:57:00,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-21 22:57:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:00,913 INFO L225 Difference]: With dead ends: 380 [2020-08-21 22:57:00,913 INFO L226 Difference]: Without dead ends: 278 [2020-08-21 22:57:00,914 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 [2020-08-21 22:57:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-21 22:57:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-21 22:57:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-21 22:57:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-21 22:57:00,935 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-21 22:57:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:00,935 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-21 22:57:00,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 22:57:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-21 22:57:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 22:57:00,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:00,938 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] [2020-08-21 22:57:00,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 22:57:00,938 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-21 22:57:00,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:00,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147925934] [2020-08-21 22:57:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:00,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 22:57:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:01,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 22:57:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:01,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 22:57:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:01,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147925934] [2020-08-21 22:57:01,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:01,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 22:57:01,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266089619] [2020-08-21 22:57:01,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 22:57:01,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:01,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 22:57:01,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:57:01,394 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-21 22:57:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:02,160 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-21 22:57:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:57:02,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 22:57:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:02,163 INFO L225 Difference]: With dead ends: 322 [2020-08-21 22:57:02,163 INFO L226 Difference]: Without dead ends: 223 [2020-08-21 22:57:02,167 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 [2020-08-21 22:57:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-21 22:57:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-21 22:57:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 22:57:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-21 22:57:02,181 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-21 22:57:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:02,182 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-21 22:57:02,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 22:57:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-21 22:57:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 22:57:02,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:02,184 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] [2020-08-21 22:57:02,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 22:57:02,184 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-21 22:57:02,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:02,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511925536] [2020-08-21 22:57:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 22:57:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 22:57:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 22:57:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:02,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511925536] [2020-08-21 22:57:02,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:02,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 22:57:02,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506231977] [2020-08-21 22:57:02,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 22:57:02,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 22:57:02,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:57:02,547 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-21 22:57:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:02,899 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-21 22:57:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:57:02,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-21 22:57:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:02,903 INFO L225 Difference]: With dead ends: 397 [2020-08-21 22:57:02,904 INFO L226 Difference]: Without dead ends: 292 [2020-08-21 22:57:02,905 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 [2020-08-21 22:57:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-21 22:57:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-21 22:57:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-21 22:57:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-21 22:57:02,927 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-21 22:57:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:02,928 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-21 22:57:02,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 22:57:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-21 22:57:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 22:57:02,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:02,931 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] [2020-08-21 22:57:02,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 22:57:02,932 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-21 22:57:02,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:02,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568641011] [2020-08-21 22:57:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 22:57:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 22:57:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 22:57:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:03,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568641011] [2020-08-21 22:57:03,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:03,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:57:03,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420544768] [2020-08-21 22:57:03,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:57:03,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:03,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:57:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:57:03,619 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-21 22:57:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:04,344 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-21 22:57:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:57:04,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-21 22:57:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:04,348 INFO L225 Difference]: With dead ends: 334 [2020-08-21 22:57:04,349 INFO L226 Difference]: Without dead ends: 232 [2020-08-21 22:57:04,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:57:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-21 22:57:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-21 22:57:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 22:57:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-21 22:57:04,364 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-21 22:57:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:04,365 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-21 22:57:04,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:57:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-21 22:57:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-21 22:57:04,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:04,366 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] [2020-08-21 22:57:04,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 22:57:04,367 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-21 22:57:04,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:04,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160278793] [2020-08-21 22:57:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 22:57:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 22:57:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 22:57:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:04,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160278793] [2020-08-21 22:57:04,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:04,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:57:04,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804758474] [2020-08-21 22:57:04,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:57:04,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:57:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:57:04,751 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-21 22:57:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:05,106 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-21 22:57:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:57:05,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-21 22:57:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:05,109 INFO L225 Difference]: With dead ends: 414 [2020-08-21 22:57:05,109 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 22:57:05,110 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 [2020-08-21 22:57:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 22:57:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-21 22:57:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-21 22:57:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-21 22:57:05,126 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-21 22:57:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:05,126 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-21 22:57:05,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:57:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-21 22:57:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 22:57:05,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:05,127 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] [2020-08-21 22:57:05,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 22:57:05,128 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-21 22:57:05,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:05,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514282440] [2020-08-21 22:57:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 22:57:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 22:57:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 22:57:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:05,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514282440] [2020-08-21 22:57:05,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:05,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:57:05,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528490476] [2020-08-21 22:57:05,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:57:05,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:57:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:57:05,614 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-21 22:57:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:06,447 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-21 22:57:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 22:57:06,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-21 22:57:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:06,452 INFO L225 Difference]: With dead ends: 346 [2020-08-21 22:57:06,452 INFO L226 Difference]: Without dead ends: 241 [2020-08-21 22:57:06,453 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 [2020-08-21 22:57:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-21 22:57:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-21 22:57:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-21 22:57:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-21 22:57:06,468 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-21 22:57:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:06,469 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-21 22:57:06,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:57:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-21 22:57:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 22:57:06,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:06,473 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] [2020-08-21 22:57:06,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-21 22:57:06,474 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-21 22:57:06,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:06,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454973313] [2020-08-21 22:57:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 22:57:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 22:57:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 22:57:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:06,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454973313] [2020-08-21 22:57:06,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:06,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:57:06,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971192331] [2020-08-21 22:57:06,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:57:06,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:57:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:57:06,841 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-21 22:57:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:07,149 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-21 22:57:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 22:57:07,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-21 22:57:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:07,153 INFO L225 Difference]: With dead ends: 431 [2020-08-21 22:57:07,153 INFO L226 Difference]: Without dead ends: 320 [2020-08-21 22:57:07,154 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 [2020-08-21 22:57:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-21 22:57:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-21 22:57:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-21 22:57:07,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-21 22:57:07,169 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-21 22:57:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:07,170 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-21 22:57:07,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:57:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-21 22:57:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 22:57:07,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:07,172 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] [2020-08-21 22:57:07,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-21 22:57:07,172 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-21 22:57:07,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:07,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842905441] [2020-08-21 22:57:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 22:57:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 22:57:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:57:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:07,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842905441] [2020-08-21 22:57:07,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:07,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 22:57:07,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437897290] [2020-08-21 22:57:07,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 22:57:07,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:07,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 22:57:07,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:57:07,722 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-21 22:57:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:08,534 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-21 22:57:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 22:57:08,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-21 22:57:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:08,537 INFO L225 Difference]: With dead ends: 358 [2020-08-21 22:57:08,537 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 22:57:08,538 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 [2020-08-21 22:57:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 22:57:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-21 22:57:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-21 22:57:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-21 22:57:08,553 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-21 22:57:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:08,553 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-21 22:57:08,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 22:57:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-21 22:57:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 22:57:08,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:08,555 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] [2020-08-21 22:57:08,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-21 22:57:08,555 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-21 22:57:08,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:08,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301823521] [2020-08-21 22:57:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 22:57:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 22:57:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:08,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301823521] [2020-08-21 22:57:08,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:08,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 22:57:08,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173446261] [2020-08-21 22:57:08,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 22:57:08,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:08,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 22:57:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:57:08,953 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-21 22:57:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:09,226 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-21 22:57:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 22:57:09,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-21 22:57:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:09,229 INFO L225 Difference]: With dead ends: 448 [2020-08-21 22:57:09,229 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 22:57:09,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:57:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 22:57:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-21 22:57:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 22:57:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-21 22:57:09,255 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-21 22:57:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:09,256 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-21 22:57:09,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 22:57:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-21 22:57:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 22:57:09,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:09,258 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] [2020-08-21 22:57:09,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-21 22:57:09,258 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:09,259 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-21 22:57:09,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:09,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712559942] [2020-08-21 22:57:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 22:57:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 22:57:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 22:57:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:09,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712559942] [2020-08-21 22:57:09,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:09,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 22:57:09,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850958778] [2020-08-21 22:57:09,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 22:57:09,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 22:57:09,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:57:09,857 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-21 22:57:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:10,817 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-21 22:57:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:57:10,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-21 22:57:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:10,822 INFO L225 Difference]: With dead ends: 370 [2020-08-21 22:57:10,822 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 22:57:10,826 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 [2020-08-21 22:57:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 22:57:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-21 22:57:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 22:57:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-21 22:57:10,848 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-21 22:57:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:10,848 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-21 22:57:10,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 22:57:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-21 22:57:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 22:57:10,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:10,850 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] [2020-08-21 22:57:10,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-21 22:57:10,851 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-21 22:57:10,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:10,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649206914] [2020-08-21 22:57:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 22:57:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 22:57:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 22:57:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:11,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649206914] [2020-08-21 22:57:11,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:11,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 22:57:11,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651347632] [2020-08-21 22:57:11,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 22:57:11,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 22:57:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:57:11,426 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-21 22:57:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:11,821 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-21 22:57:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:57:11,822 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-21 22:57:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:11,825 INFO L225 Difference]: With dead ends: 465 [2020-08-21 22:57:11,825 INFO L226 Difference]: Without dead ends: 348 [2020-08-21 22:57:11,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:57:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-21 22:57:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-21 22:57:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-21 22:57:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-21 22:57:11,845 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-21 22:57:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:11,845 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-21 22:57:11,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 22:57:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-21 22:57:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-21 22:57:11,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:11,848 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] [2020-08-21 22:57:11,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-21 22:57:11,848 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-21 22:57:11,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:11,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924813895] [2020-08-21 22:57:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:11,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:12,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 22:57:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:12,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 22:57:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:12,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 22:57:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:12,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924813895] [2020-08-21 22:57:12,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:12,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 22:57:12,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128808598] [2020-08-21 22:57:12,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 22:57:12,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 22:57:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:57:12,495 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-21 22:57:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:13,630 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-21 22:57:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:57:13,634 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-21 22:57:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:13,636 INFO L225 Difference]: With dead ends: 382 [2020-08-21 22:57:13,636 INFO L226 Difference]: Without dead ends: 268 [2020-08-21 22:57:13,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:57:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-21 22:57:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-21 22:57:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-21 22:57:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-21 22:57:13,661 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-21 22:57:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:13,662 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-21 22:57:13,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 22:57:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-21 22:57:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-21 22:57:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:13,665 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] [2020-08-21 22:57:13,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-21 22:57:13,665 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-21 22:57:13,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:13,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528182781] [2020-08-21 22:57:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:13,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:13,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 22:57:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 22:57:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 22:57:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:14,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528182781] [2020-08-21 22:57:14,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:14,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 22:57:14,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772673078] [2020-08-21 22:57:14,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 22:57:14,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 22:57:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:57:14,148 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-21 22:57:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:14,605 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-21 22:57:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:57:14,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-21 22:57:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:14,609 INFO L225 Difference]: With dead ends: 482 [2020-08-21 22:57:14,609 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 22:57:14,611 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 [2020-08-21 22:57:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 22:57:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-21 22:57:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-21 22:57:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-21 22:57:14,634 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-21 22:57:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:14,634 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-21 22:57:14,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 22:57:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-21 22:57:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 22:57:14,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:14,636 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] [2020-08-21 22:57:14,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-21 22:57:14,637 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-21 22:57:14,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:14,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248602959] [2020-08-21 22:57:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:14,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 22:57:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:15,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 22:57:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:15,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 22:57:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:15,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248602959] [2020-08-21 22:57:15,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:15,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 22:57:15,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124938744] [2020-08-21 22:57:15,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 22:57:15,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:15,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 22:57:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:57:15,308 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-21 22:57:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:16,513 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-21 22:57:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 22:57:16,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-21 22:57:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:16,516 INFO L225 Difference]: With dead ends: 394 [2020-08-21 22:57:16,516 INFO L226 Difference]: Without dead ends: 277 [2020-08-21 22:57:16,518 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 [2020-08-21 22:57:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-21 22:57:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-21 22:57:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-21 22:57:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-21 22:57:16,537 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-21 22:57:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:16,537 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-21 22:57:16,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 22:57:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-21 22:57:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 22:57:16,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:16,539 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] [2020-08-21 22:57:16,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-21 22:57:16,539 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-21 22:57:16,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:16,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056694090] [2020-08-21 22:57:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:16,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:16,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 22:57:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:57:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 22:57:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:17,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056694090] [2020-08-21 22:57:17,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:17,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 22:57:17,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527135616] [2020-08-21 22:57:17,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 22:57:17,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:17,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 22:57:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:57:17,035 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-21 22:57:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:17,376 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-21 22:57:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 22:57:17,377 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-21 22:57:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:17,379 INFO L225 Difference]: With dead ends: 499 [2020-08-21 22:57:17,380 INFO L226 Difference]: Without dead ends: 376 [2020-08-21 22:57:17,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:57:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-21 22:57:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-21 22:57:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-21 22:57:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-21 22:57:17,401 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-21 22:57:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:17,401 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-21 22:57:17,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 22:57:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-21 22:57:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 22:57:17,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:17,403 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] [2020-08-21 22:57:17,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-21 22:57:17,403 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:17,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:17,404 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-21 22:57:17,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:17,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198829348] [2020-08-21 22:57:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:17,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:18,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 22:57:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:18,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 22:57:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:18,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:18,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198829348] [2020-08-21 22:57:18,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:18,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 22:57:18,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948907874] [2020-08-21 22:57:18,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 22:57:18,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 22:57:18,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:57:18,148 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-21 22:57:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:19,456 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-21 22:57:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 22:57:19,457 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-21 22:57:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:19,459 INFO L225 Difference]: With dead ends: 406 [2020-08-21 22:57:19,459 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 22:57:19,460 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 [2020-08-21 22:57:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 22:57:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-21 22:57:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-21 22:57:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-21 22:57:19,488 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-21 22:57:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:19,488 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-21 22:57:19,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 22:57:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-21 22:57:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-21 22:57:19,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:19,490 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] [2020-08-21 22:57:19,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-21 22:57:19,490 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-21 22:57:19,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:19,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524453636] [2020-08-21 22:57:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:19,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 22:57:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 22:57:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 22:57:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:20,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524453636] [2020-08-21 22:57:20,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:20,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 22:57:20,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082157227] [2020-08-21 22:57:20,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 22:57:20,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 22:57:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:57:20,039 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-21 22:57:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:20,474 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-21 22:57:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 22:57:20,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-21 22:57:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:20,478 INFO L225 Difference]: With dead ends: 516 [2020-08-21 22:57:20,478 INFO L226 Difference]: Without dead ends: 390 [2020-08-21 22:57:20,481 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 [2020-08-21 22:57:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-21 22:57:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-21 22:57:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 22:57:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-21 22:57:20,502 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-21 22:57:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:20,503 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-21 22:57:20,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 22:57:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-21 22:57:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 22:57:20,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:20,505 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] [2020-08-21 22:57:20,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-21 22:57:20,506 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-21 22:57:20,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:20,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075753777] [2020-08-21 22:57:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:20,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 22:57:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:21,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 22:57:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:21,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 22:57:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:21,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075753777] [2020-08-21 22:57:21,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:21,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 22:57:21,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957460752] [2020-08-21 22:57:21,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 22:57:21,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 22:57:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-21 22:57:21,266 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-21 22:57:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:22,651 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-21 22:57:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 22:57:22,652 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-21 22:57:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:22,654 INFO L225 Difference]: With dead ends: 418 [2020-08-21 22:57:22,654 INFO L226 Difference]: Without dead ends: 295 [2020-08-21 22:57:22,655 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 [2020-08-21 22:57:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-21 22:57:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-21 22:57:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-21 22:57:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-21 22:57:22,674 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-21 22:57:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:22,674 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-21 22:57:22,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 22:57:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-21 22:57:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 22:57:22,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:22,676 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] [2020-08-21 22:57:22,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-21 22:57:22,676 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-21 22:57:22,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:22,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448650983] [2020-08-21 22:57:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:22,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 22:57:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 22:57:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 22:57:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 22:57:23,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448650983] [2020-08-21 22:57:23,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:23,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 22:57:23,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31796590] [2020-08-21 22:57:23,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 22:57:23,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 22:57:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-21 22:57:23,249 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-21 22:57:23,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:23,700 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-21 22:57:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 22:57:23,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-21 22:57:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:23,704 INFO L225 Difference]: With dead ends: 533 [2020-08-21 22:57:23,704 INFO L226 Difference]: Without dead ends: 404 [2020-08-21 22:57:23,705 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 [2020-08-21 22:57:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-21 22:57:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-21 22:57:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 22:57:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-21 22:57:23,725 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-21 22:57:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:23,725 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-21 22:57:23,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 22:57:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-21 22:57:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 22:57:23,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:23,727 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] [2020-08-21 22:57:23,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-21 22:57:23,727 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-21 22:57:23,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:23,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560959955] [2020-08-21 22:57:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 22:57:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 22:57:23,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560959955] [2020-08-21 22:57:23,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:57:23,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 22:57:23,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304747675] [2020-08-21 22:57:23,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:57:23,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:57:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:57:23,903 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-21 22:57:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:24,165 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-21 22:57:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:24,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 22:57:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:24,169 INFO L225 Difference]: With dead ends: 271 [2020-08-21 22:57:24,169 INFO L226 Difference]: Without dead ends: 261 [2020-08-21 22:57:24,170 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 [2020-08-21 22:57:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-21 22:57:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-21 22:57:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-21 22:57:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-21 22:57:24,193 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-21 22:57:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:24,193 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-21 22:57:24,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:57:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-21 22:57:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 22:57:24,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:24,196 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] [2020-08-21 22:57:24,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-21 22:57:24,196 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-21 22:57:24,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:24,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083931371] [2020-08-21 22:57:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 22:57:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 22:57:24,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083931371] [2020-08-21 22:57:24,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:24,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:57:24,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174789192] [2020-08-21 22:57:24,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:57:24,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:57:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:57:24,425 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-21 22:57:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:24,639 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-21 22:57:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:24,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 22:57:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:24,647 INFO L225 Difference]: With dead ends: 285 [2020-08-21 22:57:24,647 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 22:57:24,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:57:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 22:57:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-21 22:57:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 22:57:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-21 22:57:24,679 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-21 22:57:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:24,680 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-21 22:57:24,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:57:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-21 22:57:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 22:57:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:24,683 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] [2020-08-21 22:57:24,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-21 22:57:24,683 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-21 22:57:24,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:24,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352483277] [2020-08-21 22:57:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 22:57:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-21 22:57:24,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352483277] [2020-08-21 22:57:24,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:57:24,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:57:24,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111681904] [2020-08-21 22:57:24,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:57:24,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:24,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:57:24,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:57:24,799 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-21 22:57:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:24,857 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-21 22:57:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:57:24,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-21 22:57:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:24,860 INFO L225 Difference]: With dead ends: 271 [2020-08-21 22:57:24,860 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 22:57:24,860 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 [2020-08-21 22:57:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 22:57:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-21 22:57:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 22:57:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-21 22:57:24,894 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-21 22:57:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:24,895 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-21 22:57:24,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:57:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-21 22:57:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 22:57:24,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:24,897 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] [2020-08-21 22:57:24,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-21 22:57:24,898 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-21 22:57:24,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:24,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88050874] [2020-08-21 22:57:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 22:57:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 22:57:25,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88050874] [2020-08-21 22:57:25,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:25,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:57:25,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363575543] [2020-08-21 22:57:25,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:57:25,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:57:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:57:25,212 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-21 22:57:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:25,486 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-21 22:57:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:25,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-21 22:57:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:25,490 INFO L225 Difference]: With dead ends: 284 [2020-08-21 22:57:25,490 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 22:57:25,492 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 [2020-08-21 22:57:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 22:57:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-21 22:57:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-21 22:57:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-21 22:57:25,529 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-21 22:57:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:25,530 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-21 22:57:25,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:57:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-21 22:57:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 22:57:25,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:25,532 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] [2020-08-21 22:57:25,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-21 22:57:25,532 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-21 22:57:25,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:25,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852864993] [2020-08-21 22:57:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 22:57:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 22:57:25,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852864993] [2020-08-21 22:57:25,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:57:25,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:57:25,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388414678] [2020-08-21 22:57:25,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:57:25,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:57:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:57:25,707 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-21 22:57:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:25,820 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-21 22:57:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:57:25,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-21 22:57:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:25,825 INFO L225 Difference]: With dead ends: 303 [2020-08-21 22:57:25,825 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 22:57:25,826 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 [2020-08-21 22:57:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 22:57:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-21 22:57:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-21 22:57:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-21 22:57:25,873 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-21 22:57:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:25,874 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-21 22:57:25,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:57:25,875 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-21 22:57:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 22:57:25,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:25,878 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] [2020-08-21 22:57:25,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-21 22:57:25,880 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-21 22:57:25,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:25,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958754189] [2020-08-21 22:57:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 22:57:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 22:57:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 22:57:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 22:57:26,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958754189] [2020-08-21 22:57:26,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:26,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:57:26,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066655011] [2020-08-21 22:57:26,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:57:26,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:57:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:57:26,044 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-21 22:57:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:26,142 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-21 22:57:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:57:26,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-21 22:57:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:26,144 INFO L225 Difference]: With dead ends: 409 [2020-08-21 22:57:26,144 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 22:57:26,146 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 [2020-08-21 22:57:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 22:57:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-21 22:57:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 22:57:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-21 22:57:26,169 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-21 22:57:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:26,169 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-21 22:57:26,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:57:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-21 22:57:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 22:57:26,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:26,171 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] [2020-08-21 22:57:26,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-21 22:57:26,171 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-21 22:57:26,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:26,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77078787] [2020-08-21 22:57:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 22:57:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-21 22:57:26,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77078787] [2020-08-21 22:57:26,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:26,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:57:26,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444292190] [2020-08-21 22:57:26,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:57:26,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:57:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:57:26,367 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-21 22:57:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:26,521 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-21 22:57:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:57:26,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-21 22:57:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:26,524 INFO L225 Difference]: With dead ends: 173 [2020-08-21 22:57:26,524 INFO L226 Difference]: Without dead ends: 163 [2020-08-21 22:57:26,524 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 [2020-08-21 22:57:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-21 22:57:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-21 22:57:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-21 22:57:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-21 22:57:26,545 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-21 22:57:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:26,545 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-21 22:57:26,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:57:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-21 22:57:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 22:57:26,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:26,547 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] [2020-08-21 22:57:26,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-21 22:57:26,547 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-21 22:57:26,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:26,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126792321] [2020-08-21 22:57:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 22:57:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 22:57:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-21 22:57:26,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126792321] [2020-08-21 22:57:26,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:26,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:57:26,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874276256] [2020-08-21 22:57:26,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:57:26,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:26,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:57:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:57:26,827 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-21 22:57:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:27,101 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-21 22:57:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:57:27,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-21 22:57:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:27,103 INFO L225 Difference]: With dead ends: 175 [2020-08-21 22:57:27,103 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 22:57:27,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:57:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 22:57:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-21 22:57:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 22:57:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-21 22:57:27,118 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-21 22:57:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:27,118 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-21 22:57:27,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:57:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-21 22:57:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 22:57:27,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:27,120 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 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] [2020-08-21 22:57:27,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-21 22:57:27,120 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-21 22:57:27,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:27,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244333087] [2020-08-21 22:57:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:57:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-21 22:57:27,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244333087] [2020-08-21 22:57:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:57:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 22:57:27,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399735668] [2020-08-21 22:57:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:57:27,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:57:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:57:27,391 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-21 22:57:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:27,608 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-21 22:57:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:27,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-21 22:57:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:27,610 INFO L225 Difference]: With dead ends: 184 [2020-08-21 22:57:27,610 INFO L226 Difference]: Without dead ends: 174 [2020-08-21 22:57:27,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:57:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-21 22:57:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-21 22:57:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-21 22:57:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-21 22:57:27,632 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-21 22:57:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:27,634 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-21 22:57:27,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:57:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-21 22:57:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 22:57:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:27,640 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 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] [2020-08-21 22:57:27,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-21 22:57:27,640 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-21 22:57:27,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:27,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528857745] [2020-08-21 22:57:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:57:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 22:57:27,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528857745] [2020-08-21 22:57:27,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:27,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:57:27,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041595765] [2020-08-21 22:57:27,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:57:27,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:57:27,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:57:27,935 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-21 22:57:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:28,113 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-21 22:57:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:28,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-21 22:57:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:28,116 INFO L225 Difference]: With dead ends: 194 [2020-08-21 22:57:28,116 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 22:57:28,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:57:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 22:57:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-21 22:57:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 22:57:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-21 22:57:28,136 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-21 22:57:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:28,137 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-21 22:57:28,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:57:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-21 22:57:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 22:57:28,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:28,138 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] [2020-08-21 22:57:28,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-21 22:57:28,138 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-21 22:57:28,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:28,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481973672] [2020-08-21 22:57:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:57:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-21 22:57:28,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481973672] [2020-08-21 22:57:28,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:28,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:57:28,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387001166] [2020-08-21 22:57:28,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:57:28,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:57:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:57:28,402 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-21 22:57:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:28,571 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-21 22:57:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:28,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-21 22:57:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:28,573 INFO L225 Difference]: With dead ends: 160 [2020-08-21 22:57:28,573 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 22:57:28,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:57:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 22:57:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-21 22:57:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 22:57:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-21 22:57:28,591 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-21 22:57:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:28,592 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-21 22:57:28,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:57:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-21 22:57:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 22:57:28,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:28,593 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] [2020-08-21 22:57:28,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-21 22:57:28,593 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-21 22:57:28,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:28,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457197209] [2020-08-21 22:57:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:57:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 22:57:28,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457197209] [2020-08-21 22:57:28,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:28,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:57:28,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51873691] [2020-08-21 22:57:28,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:57:28,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:57:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:57:28,942 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-21 22:57:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:29,212 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-21 22:57:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:57:29,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-21 22:57:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:29,216 INFO L225 Difference]: With dead ends: 155 [2020-08-21 22:57:29,217 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 22:57:29,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:57:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 22:57:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-21 22:57:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 22:57:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-21 22:57:29,232 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-21 22:57:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:29,232 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-21 22:57:29,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:57:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-21 22:57:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 22:57:29,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:57:29,234 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 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] [2020-08-21 22:57:29,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-21 22:57:29,234 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:57:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:57:29,235 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-21 22:57:29,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:57:29,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728099865] [2020-08-21 22:57:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:57:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:57:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:57:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:57:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 22:57:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 22:57:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:57:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:57:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-21 22:57:29,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728099865] [2020-08-21 22:57:29,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:57:29,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:57:29,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115088809] [2020-08-21 22:57:29,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:57:29,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:57:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:57:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:57:29,502 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-21 22:57:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:57:29,652 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-21 22:57:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:57:29,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-21 22:57:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:57:29,653 INFO L225 Difference]: With dead ends: 137 [2020-08-21 22:57:29,653 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:57:29,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:57:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:57:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:57:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:57:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:57:29,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-21 22:57:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:57:29,655 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:57:29,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:57:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:57:29,656 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:57:29,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-21 22:57:29,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:57:30,400 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136