/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:14:18,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:14:18,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:14:18,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:14:18,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:14:18,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:14:18,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:14:18,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:14:18,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:14:18,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:14:18,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:14:18,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:14:18,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:14:18,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:14:18,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:14:18,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:14:18,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:14:18,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:14:18,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:14:18,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:14:18,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:14:18,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:14:18,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:14:18,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:14:18,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:14:18,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:14:18,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:14:18,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:14:18,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:14:18,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:14:18,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:14:18,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:14:18,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:14:18,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:14:18,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:14:18,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:14:18,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:14:18,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:14:18,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:14:18,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:14:18,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:14:18,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 06:14:18,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:14:18,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:14:18,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:14:18,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:14:18,840 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:14:18,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:14:18,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:14:18,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:14:18,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:14:18,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:14:18,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:14:18,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:14:18,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:14:18,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:14:18,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:14:18,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:14:18,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:14:18,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:14:18,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:14:18,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:14:18,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:14:18,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:14:18,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:14:18,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:14:18,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:14:18,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:14:18,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:14:18,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:14:18,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:14:18,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:14:19,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:14:19,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:14:19,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:14:19,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:14:19,216 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:14:19,216 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 06:14:19,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0f5974e1/e3c76e73127a461daa149a6be08a9b0e/FLAG56b78d82c [2020-08-22 06:14:19,801 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:14:19,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 06:14:19,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0f5974e1/e3c76e73127a461daa149a6be08a9b0e/FLAG56b78d82c [2020-08-22 06:14:20,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0f5974e1/e3c76e73127a461daa149a6be08a9b0e [2020-08-22 06:14:20,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:14:20,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:14:20,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:14:20,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:14:20,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:14:20,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425c36b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20, skipping insertion in model container [2020-08-22 06:14:20,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:14:20,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:14:20,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:14:20,410 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:14:20,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:14:20,553 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:14:20,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20 WrapperNode [2020-08-22 06:14:20,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:14:20,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:14:20,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:14:20,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:14:20,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... [2020-08-22 06:14:20,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:14:20,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:14:20,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:14:20,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:14:20,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:14:20,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:14:20,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:14:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 06:14:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 06:14:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 06:14:20,681 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 06:14:20,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:14:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:14:20,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 06:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:14:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:14:20,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:14:21,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:14:21,138 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 06:14:21,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:14:21 BoogieIcfgContainer [2020-08-22 06:14:21,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:14:21,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:14:21,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:14:21,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:14:21,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:14:20" (1/3) ... [2020-08-22 06:14:21,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6c7393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:14:21, skipping insertion in model container [2020-08-22 06:14:21,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:14:20" (2/3) ... [2020-08-22 06:14:21,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6c7393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:14:21, skipping insertion in model container [2020-08-22 06:14:21,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:14:21" (3/3) ... [2020-08-22 06:14:21,151 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 06:14:21,160 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:14:21,168 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:14:21,183 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:14:21,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:14:21,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:14:21,208 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:14:21,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:14:21,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:14:21,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:14:21,209 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:14:21,209 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:14:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 06:14:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 06:14:21,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:21,236 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] [2020-08-22 06:14:21,236 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:21,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 06:14:21,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:21,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242450333] [2020-08-22 06:14:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 06:14:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 06:14:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 06:14:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:21,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242450333] [2020-08-22 06:14:21,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:21,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 06:14:21,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127899261] [2020-08-22 06:14:21,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:14:21,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:14:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:14:21,610 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 06:14:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:21,778 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 06:14:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:14:21,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 06:14:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:21,795 INFO L225 Difference]: With dead ends: 136 [2020-08-22 06:14:21,795 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 06:14:21,800 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 [2020-08-22 06:14:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 06:14:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 06:14:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 06:14:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 06:14:21,861 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 06:14:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:21,862 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 06:14:21,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:14:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 06:14:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 06:14:21,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:21,866 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] [2020-08-22 06:14:21,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:14:21,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 06:14:21,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:21,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924065010] [2020-08-22 06:14:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 06:14:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:21,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 06:14:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:14:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:22,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924065010] [2020-08-22 06:14:22,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:22,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 06:14:22,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091045870] [2020-08-22 06:14:22,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:14:22,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:14:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:14:22,023 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 06:14:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:22,125 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 06:14:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:14:22,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 06:14:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:22,128 INFO L225 Difference]: With dead ends: 129 [2020-08-22 06:14:22,128 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 06:14:22,130 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 [2020-08-22 06:14:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 06:14:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 06:14:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 06:14:22,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 06:14:22,148 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 06:14:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:22,148 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 06:14:22,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:14:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 06:14:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 06:14:22,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:22,165 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] [2020-08-22 06:14:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:14:22,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 06:14:22,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:22,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616949789] [2020-08-22 06:14:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 06:14:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 06:14:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 06:14:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:22,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616949789] [2020-08-22 06:14:22,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:22,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:14:22,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257974661] [2020-08-22 06:14:22,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:14:22,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:14:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:14:22,375 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 06:14:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:22,498 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 06:14:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:14:22,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 06:14:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:22,501 INFO L225 Difference]: With dead ends: 145 [2020-08-22 06:14:22,502 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 06:14:22,503 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 [2020-08-22 06:14:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 06:14:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 06:14:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 06:14:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 06:14:22,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 06:14:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:22,518 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 06:14:22,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:14:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 06:14:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 06:14:22,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:22,521 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] [2020-08-22 06:14:22,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:14:22,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 06:14:22,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:22,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413491371] [2020-08-22 06:14:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 06:14:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 06:14:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:14:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:22,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413491371] [2020-08-22 06:14:22,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:22,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:14:22,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278533585] [2020-08-22 06:14:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:14:22,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:22,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:14:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:14:22,665 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 06:14:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:22,735 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 06:14:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:14:22,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 06:14:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:22,738 INFO L225 Difference]: With dead ends: 156 [2020-08-22 06:14:22,738 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 06:14:22,740 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 [2020-08-22 06:14:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 06:14:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 06:14:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 06:14:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 06:14:22,754 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 06:14:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:22,755 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 06:14:22,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:14:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 06:14:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 06:14:22,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:22,758 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] [2020-08-22 06:14:22,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:14:22,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 06:14:22,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:22,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695069253] [2020-08-22 06:14:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 06:14:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 06:14:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 06:14:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:22,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695069253] [2020-08-22 06:14:22,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:22,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 06:14:22,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899328779] [2020-08-22 06:14:22,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:14:22,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:14:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:14:22,921 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 06:14:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:23,024 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 06:14:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:14:23,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 06:14:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:23,027 INFO L225 Difference]: With dead ends: 166 [2020-08-22 06:14:23,027 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 06:14:23,028 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 [2020-08-22 06:14:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 06:14:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 06:14:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 06:14:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 06:14:23,043 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 06:14:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:23,044 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 06:14:23,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:14:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 06:14:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 06:14:23,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:23,046 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] [2020-08-22 06:14:23,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:14:23,047 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 06:14:23,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:23,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055095251] [2020-08-22 06:14:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 06:14:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 06:14:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:14:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:23,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055095251] [2020-08-22 06:14:23,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:23,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 06:14:23,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640879927] [2020-08-22 06:14:23,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:14:23,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:14:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:14:23,193 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 06:14:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:23,298 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 06:14:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:14:23,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 06:14:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:23,301 INFO L225 Difference]: With dead ends: 176 [2020-08-22 06:14:23,301 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 06:14:23,302 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 [2020-08-22 06:14:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 06:14:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 06:14:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 06:14:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 06:14:23,315 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 06:14:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:23,315 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 06:14:23,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:14:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 06:14:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 06:14:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:23,317 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] [2020-08-22 06:14:23,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:14:23,318 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 06:14:23,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:23,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129769430] [2020-08-22 06:14:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 06:14:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:14:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 06:14:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:23,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129769430] [2020-08-22 06:14:23,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:23,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 06:14:23,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430059708] [2020-08-22 06:14:23,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:14:23,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:14:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:14:23,477 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 06:14:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:23,623 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 06:14:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:14:23,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 06:14:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:23,625 INFO L225 Difference]: With dead ends: 178 [2020-08-22 06:14:23,626 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 06:14:23,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:14:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 06:14:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 06:14:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 06:14:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 06:14:23,639 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 06:14:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:23,639 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 06:14:23,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:14:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 06:14:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 06:14:23,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:23,641 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] [2020-08-22 06:14:23,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:14:23,641 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 06:14:23,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:23,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638684466] [2020-08-22 06:14:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 06:14:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 06:14:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 06:14:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:23,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638684466] [2020-08-22 06:14:23,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:23,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 06:14:23,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345030250] [2020-08-22 06:14:23,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:14:23,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:14:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:14:23,742 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 06:14:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:23,842 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 06:14:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:14:23,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 06:14:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:23,844 INFO L225 Difference]: With dead ends: 193 [2020-08-22 06:14:23,844 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 06:14:23,845 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 [2020-08-22 06:14:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 06:14:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 06:14:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 06:14:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 06:14:23,856 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 06:14:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:23,856 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 06:14:23,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:14:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 06:14:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 06:14:23,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:23,858 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] [2020-08-22 06:14:23,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:14:23,858 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 06:14:23,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:23,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630056381] [2020-08-22 06:14:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 06:14:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:14:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 06:14:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:24,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630056381] [2020-08-22 06:14:24,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:24,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:14:24,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350122715] [2020-08-22 06:14:24,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:14:24,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:14:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:14:24,013 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 06:14:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:24,187 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 06:14:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:14:24,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 06:14:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:24,190 INFO L225 Difference]: With dead ends: 190 [2020-08-22 06:14:24,190 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 06:14:24,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:14:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 06:14:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 06:14:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 06:14:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 06:14:24,202 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 06:14:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:24,202 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 06:14:24,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:14:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 06:14:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 06:14:24,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:24,204 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] [2020-08-22 06:14:24,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:14:24,204 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 06:14:24,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:24,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681337414] [2020-08-22 06:14:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 06:14:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 06:14:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 06:14:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:24,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681337414] [2020-08-22 06:14:24,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:24,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:14:24,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489748863] [2020-08-22 06:14:24,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:14:24,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:14:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:14:24,332 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 06:14:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:24,433 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 06:14:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:14:24,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 06:14:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:24,435 INFO L225 Difference]: With dead ends: 210 [2020-08-22 06:14:24,435 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 06:14:24,436 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 [2020-08-22 06:14:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 06:14:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 06:14:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 06:14:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 06:14:24,447 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 06:14:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:24,448 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 06:14:24,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:14:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 06:14:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 06:14:24,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:24,449 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] [2020-08-22 06:14:24,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:14:24,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 06:14:24,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:24,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125903307] [2020-08-22 06:14:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 06:14:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:14:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 06:14:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:24,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125903307] [2020-08-22 06:14:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:14:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96013754] [2020-08-22 06:14:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:14:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:14:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:14:24,630 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 06:14:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:24,771 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 06:14:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:14:24,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 06:14:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:24,774 INFO L225 Difference]: With dead ends: 202 [2020-08-22 06:14:24,774 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 06:14:24,775 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 [2020-08-22 06:14:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 06:14:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 06:14:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 06:14:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 06:14:24,785 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 06:14:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:24,785 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 06:14:24,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:14:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 06:14:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 06:14:24,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:24,787 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] [2020-08-22 06:14:24,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:14:24,787 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 06:14:24,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:24,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219911121] [2020-08-22 06:14:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 06:14:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 06:14:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 06:14:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:24,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219911121] [2020-08-22 06:14:24,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:24,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:14:24,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652540582] [2020-08-22 06:14:24,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:14:24,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:14:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:14:24,919 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 06:14:25,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:25,048 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 06:14:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:14:25,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 06:14:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:25,050 INFO L225 Difference]: With dead ends: 227 [2020-08-22 06:14:25,050 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 06:14:25,051 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 [2020-08-22 06:14:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 06:14:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 06:14:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 06:14:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 06:14:25,060 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 06:14:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:25,061 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 06:14:25,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:14:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 06:14:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 06:14:25,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:25,062 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] [2020-08-22 06:14:25,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:14:25,062 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 06:14:25,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:25,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798192671] [2020-08-22 06:14:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 06:14:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 06:14:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 06:14:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:25,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798192671] [2020-08-22 06:14:25,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:25,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:14:25,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075239935] [2020-08-22 06:14:25,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:14:25,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:14:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:14:25,252 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 06:14:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:25,484 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 06:14:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:14:25,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 06:14:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:25,488 INFO L225 Difference]: With dead ends: 214 [2020-08-22 06:14:25,488 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 06:14:25,489 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 [2020-08-22 06:14:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 06:14:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 06:14:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 06:14:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 06:14:25,505 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 06:14:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:25,506 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 06:14:25,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:14:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 06:14:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 06:14:25,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:25,508 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] [2020-08-22 06:14:25,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:14:25,508 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 06:14:25,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:25,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759847416] [2020-08-22 06:14:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 06:14:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 06:14:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 06:14:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:25,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759847416] [2020-08-22 06:14:25,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:25,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:14:25,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957946091] [2020-08-22 06:14:25,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:14:25,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:14:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:14:25,674 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 06:14:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:25,848 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 06:14:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:14:25,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 06:14:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:25,850 INFO L225 Difference]: With dead ends: 244 [2020-08-22 06:14:25,850 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 06:14:25,852 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 [2020-08-22 06:14:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 06:14:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 06:14:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 06:14:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 06:14:25,866 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 06:14:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:25,867 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 06:14:25,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:14:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 06:14:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 06:14:25,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:25,868 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] [2020-08-22 06:14:25,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:14:25,869 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 06:14:25,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:25,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172348] [2020-08-22 06:14:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:25,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 06:14:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 06:14:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 06:14:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:26,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172348] [2020-08-22 06:14:26,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:26,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 06:14:26,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108137749] [2020-08-22 06:14:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:14:26,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:14:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:14:26,135 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 06:14:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:26,377 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 06:14:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 06:14:26,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 06:14:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:26,379 INFO L225 Difference]: With dead ends: 226 [2020-08-22 06:14:26,380 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 06:14:26,380 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 [2020-08-22 06:14:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 06:14:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 06:14:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 06:14:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 06:14:26,392 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 06:14:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:26,393 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 06:14:26,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:14:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 06:14:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 06:14:26,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:26,394 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] [2020-08-22 06:14:26,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:14:26,395 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:26,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:26,395 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 06:14:26,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:26,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864987563] [2020-08-22 06:14:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 06:14:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 06:14:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 06:14:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:26,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864987563] [2020-08-22 06:14:26,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:26,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 06:14:26,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185298720] [2020-08-22 06:14:26,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:14:26,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:26,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:14:26,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:14:26,564 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 06:14:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:26,696 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 06:14:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 06:14:26,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 06:14:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:26,699 INFO L225 Difference]: With dead ends: 261 [2020-08-22 06:14:26,699 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 06:14:26,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:14:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 06:14:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 06:14:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 06:14:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 06:14:26,713 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 06:14:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:26,714 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 06:14:26,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:14:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 06:14:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 06:14:26,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:26,717 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] [2020-08-22 06:14:26,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 06:14:26,717 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:26,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 06:14:26,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:26,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242572432] [2020-08-22 06:14:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 06:14:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 06:14:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 06:14:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:26,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242572432] [2020-08-22 06:14:26,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:26,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:14:26,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563809140] [2020-08-22 06:14:26,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:14:26,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:14:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:14:26,976 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 06:14:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:27,222 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 06:14:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 06:14:27,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 06:14:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:27,224 INFO L225 Difference]: With dead ends: 238 [2020-08-22 06:14:27,225 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 06:14:27,226 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 [2020-08-22 06:14:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 06:14:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 06:14:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 06:14:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 06:14:27,238 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 06:14:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:27,238 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 06:14:27,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:14:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 06:14:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 06:14:27,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:27,242 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] [2020-08-22 06:14:27,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 06:14:27,242 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 06:14:27,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:27,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837066891] [2020-08-22 06:14:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 06:14:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 06:14:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 06:14:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:27,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837066891] [2020-08-22 06:14:27,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:27,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:14:27,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114945045] [2020-08-22 06:14:27,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:14:27,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:14:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:14:27,428 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 06:14:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:27,567 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 06:14:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 06:14:27,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 06:14:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:27,569 INFO L225 Difference]: With dead ends: 278 [2020-08-22 06:14:27,569 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 06:14:27,570 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 [2020-08-22 06:14:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 06:14:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 06:14:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 06:14:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 06:14:27,582 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 06:14:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:27,582 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 06:14:27,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:14:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 06:14:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 06:14:27,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:27,584 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] [2020-08-22 06:14:27,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 06:14:27,584 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 06:14:27,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:27,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875171772] [2020-08-22 06:14:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 06:14:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 06:14:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 06:14:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:27,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875171772] [2020-08-22 06:14:27,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:27,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 06:14:27,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419002489] [2020-08-22 06:14:27,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 06:14:27,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 06:14:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:14:27,834 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 06:14:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:28,135 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 06:14:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:14:28,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 06:14:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:28,137 INFO L225 Difference]: With dead ends: 250 [2020-08-22 06:14:28,137 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 06:14:28,138 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 [2020-08-22 06:14:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 06:14:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 06:14:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 06:14:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 06:14:28,149 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 06:14:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:28,149 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 06:14:28,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 06:14:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 06:14:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 06:14:28,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:28,151 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] [2020-08-22 06:14:28,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 06:14:28,151 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 06:14:28,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:28,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894280224] [2020-08-22 06:14:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 06:14:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 06:14:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 06:14:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:28,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894280224] [2020-08-22 06:14:28,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:28,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 06:14:28,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586929255] [2020-08-22 06:14:28,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 06:14:28,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:28,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 06:14:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:14:28,319 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 06:14:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:28,467 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 06:14:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:14:28,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 06:14:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:28,472 INFO L225 Difference]: With dead ends: 295 [2020-08-22 06:14:28,472 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 06:14:28,474 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 [2020-08-22 06:14:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 06:14:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 06:14:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 06:14:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 06:14:28,488 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 06:14:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:28,488 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 06:14:28,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 06:14:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 06:14:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 06:14:28,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:28,490 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] [2020-08-22 06:14:28,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 06:14:28,491 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 06:14:28,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:28,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282212875] [2020-08-22 06:14:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 06:14:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 06:14:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 06:14:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:28,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282212875] [2020-08-22 06:14:28,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:28,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 06:14:28,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192840402] [2020-08-22 06:14:28,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 06:14:28,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 06:14:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:14:28,802 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 06:14:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:29,174 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 06:14:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:14:29,175 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 06:14:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:29,176 INFO L225 Difference]: With dead ends: 262 [2020-08-22 06:14:29,176 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 06:14:29,177 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 [2020-08-22 06:14:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 06:14:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 06:14:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 06:14:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 06:14:29,204 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 06:14:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:29,204 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 06:14:29,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 06:14:29,204 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 06:14:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 06:14:29,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:29,205 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] [2020-08-22 06:14:29,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 06:14:29,206 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:29,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 06:14:29,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:29,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992833551] [2020-08-22 06:14:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 06:14:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 06:14:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:14:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:29,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992833551] [2020-08-22 06:14:29,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:29,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 06:14:29,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943279400] [2020-08-22 06:14:29,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 06:14:29,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 06:14:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:14:29,394 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 06:14:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:29,564 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 06:14:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:14:29,565 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 06:14:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:29,567 INFO L225 Difference]: With dead ends: 312 [2020-08-22 06:14:29,567 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 06:14:29,568 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 [2020-08-22 06:14:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 06:14:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 06:14:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 06:14:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 06:14:29,580 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 06:14:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:29,581 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 06:14:29,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 06:14:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 06:14:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 06:14:29,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:29,582 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] [2020-08-22 06:14:29,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 06:14:29,583 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:29,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 06:14:29,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:29,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843247544] [2020-08-22 06:14:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 06:14:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 06:14:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 06:14:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:29,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843247544] [2020-08-22 06:14:29,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:29,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 06:14:29,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155108702] [2020-08-22 06:14:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 06:14:29,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 06:14:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:14:29,904 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 06:14:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:30,313 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 06:14:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 06:14:30,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 06:14:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:30,316 INFO L225 Difference]: With dead ends: 274 [2020-08-22 06:14:30,316 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 06:14:30,317 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 [2020-08-22 06:14:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 06:14:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 06:14:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 06:14:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 06:14:30,332 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 06:14:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:30,332 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 06:14:30,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 06:14:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 06:14:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 06:14:30,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:30,334 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] [2020-08-22 06:14:30,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 06:14:30,334 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:30,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:30,334 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 06:14:30,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:30,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643578211] [2020-08-22 06:14:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 06:14:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 06:14:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 06:14:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:30,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643578211] [2020-08-22 06:14:30,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:30,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 06:14:30,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140316575] [2020-08-22 06:14:30,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 06:14:30,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 06:14:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:14:30,580 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 06:14:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:30,796 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 06:14:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 06:14:30,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 06:14:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:30,800 INFO L225 Difference]: With dead ends: 329 [2020-08-22 06:14:30,800 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 06:14:30,801 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 [2020-08-22 06:14:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 06:14:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 06:14:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 06:14:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 06:14:30,820 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 06:14:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:30,821 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 06:14:30,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 06:14:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 06:14:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 06:14:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:30,823 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] [2020-08-22 06:14:30,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 06:14:30,827 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:30,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 06:14:30,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:30,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513621389] [2020-08-22 06:14:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:30,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 06:14:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 06:14:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 06:14:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:31,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513621389] [2020-08-22 06:14:31,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:31,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 06:14:31,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774707191] [2020-08-22 06:14:31,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 06:14:31,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 06:14:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:14:31,199 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 06:14:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:31,628 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 06:14:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 06:14:31,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 06:14:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:31,631 INFO L225 Difference]: With dead ends: 286 [2020-08-22 06:14:31,631 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 06:14:31,632 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 [2020-08-22 06:14:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 06:14:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 06:14:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 06:14:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 06:14:31,646 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 06:14:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:31,647 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 06:14:31,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 06:14:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 06:14:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 06:14:31,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:31,648 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] [2020-08-22 06:14:31,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 06:14:31,649 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 06:14:31,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:31,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474545395] [2020-08-22 06:14:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 06:14:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 06:14:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 06:14:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:31,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474545395] [2020-08-22 06:14:31,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:31,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 06:14:31,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93693017] [2020-08-22 06:14:31,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 06:14:31,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:31,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 06:14:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:14:31,973 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 06:14:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:32,187 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 06:14:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 06:14:32,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 06:14:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:32,190 INFO L225 Difference]: With dead ends: 346 [2020-08-22 06:14:32,190 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 06:14:32,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 06:14:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 06:14:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 06:14:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 06:14:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 06:14:32,205 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 06:14:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:32,205 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 06:14:32,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 06:14:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 06:14:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 06:14:32,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:32,207 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] [2020-08-22 06:14:32,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 06:14:32,207 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 06:14:32,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:32,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563531132] [2020-08-22 06:14:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 06:14:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:14:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 06:14:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 06:14:32,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563531132] [2020-08-22 06:14:32,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:14:32,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:14:32,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857898572] [2020-08-22 06:14:32,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:14:32,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:32,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:14:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:14:32,274 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 06:14:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:32,288 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 06:14:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:14:32,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 06:14:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:32,291 INFO L225 Difference]: With dead ends: 160 [2020-08-22 06:14:32,291 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 06:14:32,292 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 [2020-08-22 06:14:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 06:14:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 06:14:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 06:14:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 06:14:32,303 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 06:14:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:32,304 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 06:14:32,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:14:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 06:14:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 06:14:32,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:32,305 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] [2020-08-22 06:14:32,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 06:14:32,306 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:32,306 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 06:14:32,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:32,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057405538] [2020-08-22 06:14:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 06:14:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:14:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 06:14:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 06:14:32,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057405538] [2020-08-22 06:14:32,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:14:32,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 06:14:32,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96507857] [2020-08-22 06:14:32,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 06:14:32,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 06:14:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 06:14:32,369 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 06:14:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:32,392 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 06:14:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 06:14:32,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 06:14:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:32,393 INFO L225 Difference]: With dead ends: 161 [2020-08-22 06:14:32,393 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 06:14:32,394 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 [2020-08-22 06:14:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 06:14:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 06:14:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 06:14:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 06:14:32,408 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 06:14:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:32,408 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 06:14:32,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 06:14:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 06:14:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 06:14:32,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:32,410 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] [2020-08-22 06:14:32,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 06:14:32,410 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 06:14:32,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:32,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282856729] [2020-08-22 06:14:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 06:14:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:14:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 06:14:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:32,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282856729] [2020-08-22 06:14:32,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:32,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 06:14:32,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915047138] [2020-08-22 06:14:32,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 06:14:32,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 06:14:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 06:14:32,789 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 06:14:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:33,495 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 06:14:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 06:14:33,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 06:14:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:33,504 INFO L225 Difference]: With dead ends: 298 [2020-08-22 06:14:33,504 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 06:14:33,507 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 [2020-08-22 06:14:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 06:14:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 06:14:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 06:14:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 06:14:33,530 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 06:14:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:33,530 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 06:14:33,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 06:14:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 06:14:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 06:14:33,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:33,533 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] [2020-08-22 06:14:33,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 06:14:33,534 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 06:14:33,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:33,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159204269] [2020-08-22 06:14:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 06:14:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 06:14:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 06:14:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:33,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159204269] [2020-08-22 06:14:33,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:33,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 06:14:33,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122622951] [2020-08-22 06:14:33,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 06:14:33,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:33,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 06:14:33,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 06:14:33,956 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 06:14:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:34,230 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 06:14:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 06:14:34,231 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 06:14:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:34,232 INFO L225 Difference]: With dead ends: 363 [2020-08-22 06:14:34,233 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 06:14:34,236 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 [2020-08-22 06:14:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 06:14:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 06:14:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 06:14:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 06:14:34,254 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 06:14:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:34,254 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 06:14:34,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 06:14:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 06:14:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 06:14:34,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:34,256 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] [2020-08-22 06:14:34,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 06:14:34,256 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 06:14:34,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:34,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137036345] [2020-08-22 06:14:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 06:14:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 06:14:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 06:14:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:34,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137036345] [2020-08-22 06:14:34,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:34,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 06:14:34,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581081398] [2020-08-22 06:14:34,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 06:14:34,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 06:14:34,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:14:34,659 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 06:14:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:35,269 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 06:14:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 06:14:35,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 06:14:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:35,275 INFO L225 Difference]: With dead ends: 310 [2020-08-22 06:14:35,277 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 06:14:35,278 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 [2020-08-22 06:14:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 06:14:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 06:14:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 06:14:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 06:14:35,293 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 06:14:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:35,293 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 06:14:35,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 06:14:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 06:14:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 06:14:35,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:35,296 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] [2020-08-22 06:14:35,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 06:14:35,297 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 06:14:35,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:35,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909161296] [2020-08-22 06:14:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 06:14:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 06:14:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 06:14:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:35,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909161296] [2020-08-22 06:14:35,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:35,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 06:14:35,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721372832] [2020-08-22 06:14:35,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 06:14:35,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 06:14:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:14:35,615 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 06:14:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:35,824 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 06:14:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 06:14:35,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 06:14:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:35,827 INFO L225 Difference]: With dead ends: 380 [2020-08-22 06:14:35,828 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 06:14:35,830 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 [2020-08-22 06:14:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 06:14:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 06:14:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 06:14:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 06:14:35,853 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 06:14:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:35,854 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 06:14:35,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 06:14:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 06:14:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 06:14:35,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:35,856 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] [2020-08-22 06:14:35,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 06:14:35,856 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 06:14:35,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:35,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375564757] [2020-08-22 06:14:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:35,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:36,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 06:14:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:36,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 06:14:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:36,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 06:14:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:36,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375564757] [2020-08-22 06:14:36,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:36,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 06:14:36,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036212945] [2020-08-22 06:14:36,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 06:14:36,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:36,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 06:14:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 06:14:36,342 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 06:14:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:37,027 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 06:14:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 06:14:37,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 06:14:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:37,029 INFO L225 Difference]: With dead ends: 322 [2020-08-22 06:14:37,030 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 06:14:37,031 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 [2020-08-22 06:14:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 06:14:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 06:14:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 06:14:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 06:14:37,047 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 06:14:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:37,048 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 06:14:37,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 06:14:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 06:14:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 06:14:37,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:37,049 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] [2020-08-22 06:14:37,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 06:14:37,050 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 06:14:37,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:37,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623825673] [2020-08-22 06:14:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 06:14:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 06:14:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 06:14:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:37,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623825673] [2020-08-22 06:14:37,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:37,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 06:14:37,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879441740] [2020-08-22 06:14:37,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 06:14:37,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 06:14:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 06:14:37,384 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 06:14:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:37,651 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 06:14:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 06:14:37,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 06:14:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:37,654 INFO L225 Difference]: With dead ends: 397 [2020-08-22 06:14:37,655 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 06:14:37,656 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 [2020-08-22 06:14:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 06:14:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 06:14:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 06:14:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 06:14:37,677 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 06:14:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:37,678 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 06:14:37,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 06:14:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 06:14:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 06:14:37,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:37,679 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] [2020-08-22 06:14:37,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 06:14:37,680 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:37,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 06:14:37,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:37,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615444076] [2020-08-22 06:14:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:37,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 06:14:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 06:14:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 06:14:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:38,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615444076] [2020-08-22 06:14:38,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:38,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 06:14:38,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098260554] [2020-08-22 06:14:38,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 06:14:38,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 06:14:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 06:14:38,212 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 06:14:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:38,945 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 06:14:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 06:14:38,947 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 06:14:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:38,949 INFO L225 Difference]: With dead ends: 334 [2020-08-22 06:14:38,949 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 06:14:38,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 06:14:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 06:14:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 06:14:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 06:14:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 06:14:38,964 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 06:14:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:38,965 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 06:14:38,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 06:14:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 06:14:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 06:14:38,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:38,966 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] [2020-08-22 06:14:38,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 06:14:38,967 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 06:14:38,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:38,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415858350] [2020-08-22 06:14:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:38,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 06:14:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 06:14:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 06:14:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:39,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415858350] [2020-08-22 06:14:39,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:39,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 06:14:39,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754942433] [2020-08-22 06:14:39,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 06:14:39,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 06:14:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 06:14:39,354 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 06:14:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:39,671 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 06:14:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 06:14:39,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 06:14:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:39,675 INFO L225 Difference]: With dead ends: 414 [2020-08-22 06:14:39,675 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 06:14:39,679 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 [2020-08-22 06:14:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 06:14:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 06:14:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 06:14:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 06:14:39,699 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 06:14:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:39,699 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 06:14:39,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 06:14:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 06:14:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 06:14:39,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:39,703 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] [2020-08-22 06:14:39,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 06:14:39,704 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 06:14:39,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:39,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033064551] [2020-08-22 06:14:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:39,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:40,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 06:14:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 06:14:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:40,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:14:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:40,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033064551] [2020-08-22 06:14:40,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:40,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 06:14:40,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11428964] [2020-08-22 06:14:40,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 06:14:40,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 06:14:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 06:14:40,252 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 06:14:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:41,071 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 06:14:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 06:14:41,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 06:14:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:41,076 INFO L225 Difference]: With dead ends: 346 [2020-08-22 06:14:41,077 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 06:14:41,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 06:14:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 06:14:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 06:14:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 06:14:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 06:14:41,095 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 06:14:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:41,095 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 06:14:41,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 06:14:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 06:14:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 06:14:41,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:41,098 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] [2020-08-22 06:14:41,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 06:14:41,098 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 06:14:41,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:41,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198482942] [2020-08-22 06:14:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 06:14:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 06:14:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 06:14:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:41,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198482942] [2020-08-22 06:14:41,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:41,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 06:14:41,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128605809] [2020-08-22 06:14:41,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 06:14:41,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:41,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 06:14:41,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 06:14:41,496 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 06:14:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:41,786 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 06:14:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 06:14:41,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 06:14:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:41,791 INFO L225 Difference]: With dead ends: 431 [2020-08-22 06:14:41,791 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 06:14:41,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 06:14:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 06:14:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 06:14:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 06:14:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 06:14:41,807 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 06:14:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:41,807 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 06:14:41,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 06:14:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 06:14:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 06:14:41,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:41,809 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] [2020-08-22 06:14:41,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 06:14:41,809 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 06:14:41,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:41,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817366277] [2020-08-22 06:14:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:41,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 06:14:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:42,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 06:14:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:42,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 06:14:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:42,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817366277] [2020-08-22 06:14:42,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:42,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 06:14:42,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19167051] [2020-08-22 06:14:42,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 06:14:42,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 06:14:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 06:14:42,363 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 06:14:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:43,213 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 06:14:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 06:14:43,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 06:14:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:43,224 INFO L225 Difference]: With dead ends: 358 [2020-08-22 06:14:43,225 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 06:14:43,226 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 [2020-08-22 06:14:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 06:14:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 06:14:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 06:14:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 06:14:43,245 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 06:14:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:43,245 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 06:14:43,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 06:14:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 06:14:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 06:14:43,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:43,248 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] [2020-08-22 06:14:43,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 06:14:43,248 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 06:14:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825071617] [2020-08-22 06:14:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 06:14:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 06:14:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:14:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:43,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825071617] [2020-08-22 06:14:43,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:43,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 06:14:43,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267073422] [2020-08-22 06:14:43,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 06:14:43,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:43,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 06:14:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 06:14:43,695 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 06:14:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:43,977 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 06:14:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 06:14:43,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 06:14:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:43,980 INFO L225 Difference]: With dead ends: 448 [2020-08-22 06:14:43,980 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 06:14:43,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 06:14:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 06:14:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 06:14:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 06:14:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 06:14:44,007 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 06:14:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:44,007 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 06:14:44,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 06:14:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 06:14:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 06:14:44,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:44,009 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] [2020-08-22 06:14:44,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 06:14:44,009 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:44,009 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 06:14:44,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:44,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883443758] [2020-08-22 06:14:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 06:14:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 06:14:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 06:14:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:44,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883443758] [2020-08-22 06:14:44,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:44,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 06:14:44,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666188282] [2020-08-22 06:14:44,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 06:14:44,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 06:14:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 06:14:44,635 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 06:14:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:45,542 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 06:14:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 06:14:45,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 06:14:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:45,544 INFO L225 Difference]: With dead ends: 370 [2020-08-22 06:14:45,545 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 06:14:45,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:14:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 06:14:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 06:14:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 06:14:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 06:14:45,561 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 06:14:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:45,562 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 06:14:45,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 06:14:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 06:14:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 06:14:45,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:45,564 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] [2020-08-22 06:14:45,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 06:14:45,564 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 06:14:45,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:45,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867954119] [2020-08-22 06:14:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 06:14:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 06:14:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:45,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 06:14:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:46,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867954119] [2020-08-22 06:14:46,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:46,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 06:14:46,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455386176] [2020-08-22 06:14:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 06:14:46,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 06:14:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 06:14:46,014 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 06:14:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:46,372 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 06:14:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 06:14:46,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 06:14:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:46,380 INFO L225 Difference]: With dead ends: 465 [2020-08-22 06:14:46,380 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 06:14:46,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:14:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 06:14:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 06:14:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 06:14:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 06:14:46,399 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 06:14:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:46,400 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 06:14:46,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 06:14:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 06:14:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 06:14:46,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:46,402 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] [2020-08-22 06:14:46,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 06:14:46,402 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:46,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 06:14:46,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:46,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494209219] [2020-08-22 06:14:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:46,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:47,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 06:14:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:47,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 06:14:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 06:14:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:47,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494209219] [2020-08-22 06:14:47,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:47,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 06:14:47,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626191776] [2020-08-22 06:14:47,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 06:14:47,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 06:14:47,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:14:47,205 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 06:14:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:48,365 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 06:14:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 06:14:48,367 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 06:14:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:48,368 INFO L225 Difference]: With dead ends: 382 [2020-08-22 06:14:48,368 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 06:14:48,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 06:14:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 06:14:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 06:14:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 06:14:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 06:14:48,385 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 06:14:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:48,387 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 06:14:48,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 06:14:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 06:14:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 06:14:48,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:48,389 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] [2020-08-22 06:14:48,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 06:14:48,389 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 06:14:48,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:48,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790933608] [2020-08-22 06:14:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 06:14:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 06:14:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 06:14:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:48,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790933608] [2020-08-22 06:14:48,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:48,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 06:14:48,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995393666] [2020-08-22 06:14:48,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 06:14:48,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 06:14:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:14:48,872 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 06:14:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:49,239 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 06:14:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 06:14:49,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 06:14:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:49,242 INFO L225 Difference]: With dead ends: 482 [2020-08-22 06:14:49,243 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 06:14:49,244 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 [2020-08-22 06:14:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 06:14:49,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 06:14:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 06:14:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 06:14:49,262 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 06:14:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:49,263 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 06:14:49,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 06:14:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 06:14:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 06:14:49,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:49,264 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] [2020-08-22 06:14:49,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 06:14:49,265 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 06:14:49,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:49,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740126732] [2020-08-22 06:14:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 06:14:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 06:14:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 06:14:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:49,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740126732] [2020-08-22 06:14:49,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:49,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 06:14:49,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681654571] [2020-08-22 06:14:49,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 06:14:49,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 06:14:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 06:14:49,926 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 06:14:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:51,175 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 06:14:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 06:14:51,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 06:14:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:51,178 INFO L225 Difference]: With dead ends: 394 [2020-08-22 06:14:51,179 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 06:14:51,181 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 [2020-08-22 06:14:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 06:14:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 06:14:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 06:14:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 06:14:51,208 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 06:14:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:51,209 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 06:14:51,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 06:14:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 06:14:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 06:14:51,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:51,211 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] [2020-08-22 06:14:51,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 06:14:51,212 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 06:14:51,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:51,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675778892] [2020-08-22 06:14:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 06:14:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 06:14:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 06:14:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:51,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675778892] [2020-08-22 06:14:51,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:51,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 06:14:51,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810458973] [2020-08-22 06:14:51,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 06:14:51,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 06:14:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 06:14:51,744 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 06:14:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:52,148 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 06:14:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 06:14:52,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 06:14:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:52,152 INFO L225 Difference]: With dead ends: 499 [2020-08-22 06:14:52,152 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 06:14:52,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:14:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 06:14:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 06:14:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 06:14:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 06:14:52,172 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 06:14:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:52,173 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 06:14:52,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 06:14:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 06:14:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 06:14:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:52,174 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] [2020-08-22 06:14:52,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 06:14:52,175 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 06:14:52,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:52,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075129435] [2020-08-22 06:14:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 06:14:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 06:14:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 06:14:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:52,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075129435] [2020-08-22 06:14:52,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:52,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 06:14:52,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291354913] [2020-08-22 06:14:52,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 06:14:52,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:52,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 06:14:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:14:52,911 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 06:14:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:54,239 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 06:14:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 06:14:54,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 06:14:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:54,246 INFO L225 Difference]: With dead ends: 406 [2020-08-22 06:14:54,246 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 06:14:54,247 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 [2020-08-22 06:14:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 06:14:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 06:14:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 06:14:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 06:14:54,265 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 06:14:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:54,266 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 06:14:54,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 06:14:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 06:14:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 06:14:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:54,267 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] [2020-08-22 06:14:54,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 06:14:54,268 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 06:14:54,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:54,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734415702] [2020-08-22 06:14:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 06:14:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 06:14:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 06:14:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:54,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734415702] [2020-08-22 06:14:54,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:54,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 06:14:54,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235392245] [2020-08-22 06:14:54,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 06:14:54,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 06:14:54,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:14:54,797 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 06:14:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:55,145 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 06:14:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 06:14:55,149 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 06:14:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:55,151 INFO L225 Difference]: With dead ends: 516 [2020-08-22 06:14:55,152 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 06:14:55,153 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 [2020-08-22 06:14:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 06:14:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 06:14:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 06:14:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 06:14:55,173 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 06:14:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:55,174 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 06:14:55,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 06:14:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 06:14:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 06:14:55,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:55,176 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] [2020-08-22 06:14:55,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 06:14:55,176 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 06:14:55,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:55,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523849641] [2020-08-22 06:14:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 06:14:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 06:14:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 06:14:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:55,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523849641] [2020-08-22 06:14:55,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:55,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 06:14:55,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657422206] [2020-08-22 06:14:55,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 06:14:55,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 06:14:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 06:14:55,932 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 06:14:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:57,397 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 06:14:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 06:14:57,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 06:14:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:57,399 INFO L225 Difference]: With dead ends: 418 [2020-08-22 06:14:57,399 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 06:14:57,401 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 [2020-08-22 06:14:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 06:14:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 06:14:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 06:14:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 06:14:57,421 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 06:14:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:57,421 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 06:14:57,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 06:14:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 06:14:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 06:14:57,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:57,424 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] [2020-08-22 06:14:57,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 06:14:57,424 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 06:14:57,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:57,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520501847] [2020-08-22 06:14:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 06:14:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 06:14:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:57,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 06:14:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 06:14:58,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520501847] [2020-08-22 06:14:58,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:58,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 06:14:58,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311736869] [2020-08-22 06:14:58,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 06:14:58,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 06:14:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 06:14:58,007 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 06:14:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:58,452 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 06:14:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 06:14:58,453 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 06:14:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:58,455 INFO L225 Difference]: With dead ends: 533 [2020-08-22 06:14:58,455 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 06:14:58,456 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 [2020-08-22 06:14:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 06:14:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 06:14:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 06:14:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 06:14:58,478 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 06:14:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:58,478 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 06:14:58,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 06:14:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 06:14:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 06:14:58,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:58,480 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] [2020-08-22 06:14:58,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 06:14:58,480 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 06:14:58,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:58,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810414221] [2020-08-22 06:14:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:14:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:14:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 06:14:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 06:14:58,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810414221] [2020-08-22 06:14:58,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:14:58,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 06:14:58,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415308929] [2020-08-22 06:14:58,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:14:58,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:14:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:14:58,682 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 06:14:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:59,066 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 06:14:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:14:59,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 06:14:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:59,070 INFO L225 Difference]: With dead ends: 271 [2020-08-22 06:14:59,070 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 06:14:59,070 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 [2020-08-22 06:14:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 06:14:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 06:14:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 06:14:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 06:14:59,096 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 06:14:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:59,097 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 06:14:59,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:14:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 06:14:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 06:14:59,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:59,099 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] [2020-08-22 06:14:59,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 06:14:59,099 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 06:14:59,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:59,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127376120] [2020-08-22 06:14:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:14:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:14:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 06:14:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 06:14:59,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127376120] [2020-08-22 06:14:59,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:14:59,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:14:59,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966305299] [2020-08-22 06:14:59,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:14:59,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:14:59,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:14:59,356 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 06:14:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:59,619 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 06:14:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:14:59,620 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 06:14:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:59,623 INFO L225 Difference]: With dead ends: 285 [2020-08-22 06:14:59,623 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 06:14:59,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:14:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 06:14:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 06:14:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 06:14:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 06:14:59,653 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 06:14:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:59,653 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 06:14:59,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:14:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 06:14:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 06:14:59,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:59,655 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] [2020-08-22 06:14:59,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 06:14:59,656 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:59,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 06:14:59,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:59,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888806693] [2020-08-22 06:14:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:14:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:14:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:14:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:14:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:14:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 06:14:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:14:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 06:14:59,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888806693] [2020-08-22 06:14:59,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:14:59,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 06:14:59,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988115693] [2020-08-22 06:14:59,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:14:59,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:14:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:14:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:14:59,763 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 06:14:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:14:59,823 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 06:14:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:14:59,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 06:14:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:14:59,826 INFO L225 Difference]: With dead ends: 271 [2020-08-22 06:14:59,826 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 06:14:59,826 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 [2020-08-22 06:14:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 06:14:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 06:14:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 06:14:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 06:14:59,855 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 06:14:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:14:59,856 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 06:14:59,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:14:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 06:14:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 06:14:59,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:14:59,858 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] [2020-08-22 06:14:59,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 06:14:59,858 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:14:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:14:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 06:14:59,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:14:59,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358494215] [2020-08-22 06:14:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:14:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:15:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 06:15:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 06:15:00,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358494215] [2020-08-22 06:15:00,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:00,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:15:00,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627994114] [2020-08-22 06:15:00,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:15:00,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:15:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:15:00,130 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 06:15:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:00,351 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 06:15:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:15:00,352 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 06:15:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:00,354 INFO L225 Difference]: With dead ends: 284 [2020-08-22 06:15:00,354 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 06:15:00,354 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 [2020-08-22 06:15:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 06:15:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 06:15:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 06:15:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 06:15:00,386 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 06:15:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:00,386 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 06:15:00,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:15:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 06:15:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 06:15:00,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:00,389 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] [2020-08-22 06:15:00,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 06:15:00,389 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 06:15:00,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119652206] [2020-08-22 06:15:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:15:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 06:15:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 06:15:00,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119652206] [2020-08-22 06:15:00,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:15:00,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:15:00,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997012409] [2020-08-22 06:15:00,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:15:00,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:15:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:15:00,539 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 06:15:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:00,662 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 06:15:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:15:00,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 06:15:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:00,665 INFO L225 Difference]: With dead ends: 303 [2020-08-22 06:15:00,665 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 06:15:00,665 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 [2020-08-22 06:15:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 06:15:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 06:15:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 06:15:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 06:15:00,695 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 06:15:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:00,695 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 06:15:00,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:15:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 06:15:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 06:15:00,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:00,697 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] [2020-08-22 06:15:00,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 06:15:00,698 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:00,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 06:15:00,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:00,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310945908] [2020-08-22 06:15:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 06:15:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 06:15:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 06:15:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 06:15:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 06:15:00,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310945908] [2020-08-22 06:15:00,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:00,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 06:15:00,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376839798] [2020-08-22 06:15:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:15:00,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:15:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:15:00,798 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 06:15:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:00,902 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 06:15:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:15:00,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 06:15:00,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:00,904 INFO L225 Difference]: With dead ends: 409 [2020-08-22 06:15:00,904 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 06:15:00,906 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 [2020-08-22 06:15:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 06:15:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 06:15:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 06:15:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 06:15:00,923 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 06:15:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:00,923 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 06:15:00,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:15:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 06:15:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 06:15:00,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:00,925 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] [2020-08-22 06:15:00,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 06:15:00,925 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 06:15:00,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:00,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343623759] [2020-08-22 06:15:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:15:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 06:15:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 06:15:01,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343623759] [2020-08-22 06:15:01,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:15:01,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 06:15:01,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571515087] [2020-08-22 06:15:01,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:15:01,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:15:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:15:01,104 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-22 06:15:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:01,224 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-22 06:15:01,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:15:01,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-22 06:15:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:01,227 INFO L225 Difference]: With dead ends: 158 [2020-08-22 06:15:01,227 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 06:15:01,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:15:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 06:15:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-22 06:15:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 06:15:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 06:15:01,245 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-22 06:15:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:01,246 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 06:15:01,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:15:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 06:15:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 06:15:01,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:01,247 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:15:01,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 06:15:01,248 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-22 06:15:01,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:01,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010495380] [2020-08-22 06:15:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:15:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 06:15:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 06:15:01,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010495380] [2020-08-22 06:15:01,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:01,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:15:01,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306752651] [2020-08-22 06:15:01,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:15:01,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:01,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:15:01,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:15:01,396 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 06:15:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:01,514 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 06:15:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:15:01,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 06:15:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:01,517 INFO L225 Difference]: With dead ends: 176 [2020-08-22 06:15:01,517 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 06:15:01,517 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 [2020-08-22 06:15:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 06:15:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-22 06:15:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 06:15:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-22 06:15:01,540 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-22 06:15:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:01,540 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-22 06:15:01,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:15:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-22 06:15:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 06:15:01,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:01,542 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:15:01,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 06:15:01,542 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-22 06:15:01,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:01,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949384542] [2020-08-22 06:15:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 06:15:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 06:15:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 06:15:01,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949384542] [2020-08-22 06:15:01,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:01,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:15:01,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244333087] [2020-08-22 06:15:01,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:15:01,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:15:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:15:01,731 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-22 06:15:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:01,929 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-22 06:15:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:15:01,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 06:15:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:01,932 INFO L225 Difference]: With dead ends: 170 [2020-08-22 06:15:01,932 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 06:15:01,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:15:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 06:15:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 06:15:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 06:15:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 06:15:01,954 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-22 06:15:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:01,956 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 06:15:01,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:15:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 06:15:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 06:15:01,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:01,958 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] [2020-08-22 06:15:01,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 06:15:01,958 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-22 06:15:01,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:01,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619322292] [2020-08-22 06:15:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 06:15:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:15:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 06:15:02,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619322292] [2020-08-22 06:15:02,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:02,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:15:02,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448021672] [2020-08-22 06:15:02,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:15:02,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:15:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:15:02,132 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-22 06:15:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:02,218 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-22 06:15:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:15:02,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-22 06:15:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:02,220 INFO L225 Difference]: With dead ends: 173 [2020-08-22 06:15:02,220 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 06:15:02,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:15:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 06:15:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 06:15:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 06:15:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-22 06:15:02,240 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-22 06:15:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:02,241 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-22 06:15:02,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:15:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-22 06:15:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 06:15:02,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:15:02,242 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] [2020-08-22 06:15:02,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 06:15:02,243 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:15:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:15:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-22 06:15:02,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:15:02,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233982190] [2020-08-22 06:15:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:15:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:15:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:15:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 06:15:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 06:15:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 06:15:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 06:15:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:15:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 06:15:02,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233982190] [2020-08-22 06:15:02,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:15:02,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:15:02,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008013074] [2020-08-22 06:15:02,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:15:02,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:15:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:15:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:15:02,496 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-22 06:15:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:15:02,640 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-22 06:15:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:15:02,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-22 06:15:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:15:02,641 INFO L225 Difference]: With dead ends: 157 [2020-08-22 06:15:02,641 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:15:02,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:15:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:15:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:15:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:15:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:15:02,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 06:15:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:15:02,643 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:15:02,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:15:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:15:02,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:15:02,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 06:15:02,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:15:08,444 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 558 DAG size of output: 226