/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:15:35,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:15:35,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:15:35,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:15:35,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:15:36,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:15:36,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:15:36,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:15:36,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:15:36,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:15:36,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:15:36,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:15:36,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:15:36,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:15:36,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:15:36,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:15:36,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:15:36,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:15:36,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:15:36,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:15:36,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:15:36,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:15:36,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:15:36,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:15:36,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:15:36,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:15:36,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:15:36,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:15:36,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:15:36,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:15:36,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:15:36,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:15:36,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:15:36,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:15:36,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:15:36,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:15:36,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:15:36,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:15:36,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:15:36,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:15:36,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:15:36,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:15:36,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:15:36,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:15:36,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:15:36,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:15:36,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:15:36,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:15:36,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:15:36,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:15:36,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:15:36,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:15:36,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:15:36,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:15:36,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:15:36,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:15:36,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:15:36,090 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:15:36,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:15:36,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:15:36,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:15:36,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:15:36,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:15:36,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:15:36,092 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:15:36,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:15:36,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:15:36,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:15:36,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:15:36,563 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:15:36,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-04 23:15:36,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d858af0da/434a0e6b552543f1a83283378cab1ab2/FLAG11e794673 [2020-09-04 23:15:37,259 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:15:37,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-09-04 23:15:37,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d858af0da/434a0e6b552543f1a83283378cab1ab2/FLAG11e794673 [2020-09-04 23:15:37,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d858af0da/434a0e6b552543f1a83283378cab1ab2 [2020-09-04 23:15:37,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:15:37,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:15:37,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:37,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:15:37,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:15:37,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:37" (1/1) ... [2020-09-04 23:15:37,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab3eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:37, skipping insertion in model container [2020-09-04 23:15:37,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:37" (1/1) ... [2020-09-04 23:15:37,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:15:37,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:15:37,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:37,995 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:15:38,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:38,188 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:15:38,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38 WrapperNode [2020-09-04 23:15:38,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:38,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:15:38,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:15:38,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:15:38,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (1/1) ... [2020-09-04 23:15:38,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:15:38,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:15:38,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:15:38,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:15:38,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (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 [2020-09-04 23:15:38,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:15:38,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:15:38,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:15:38,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:15:38,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:15:38,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 23:15:39,400 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:15:39,400 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 23:15:39,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:39 BoogieIcfgContainer [2020-09-04 23:15:39,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:15:39,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:15:39,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:15:39,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:15:39,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:15:37" (1/3) ... [2020-09-04 23:15:39,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:39, skipping insertion in model container [2020-09-04 23:15:39,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:38" (2/3) ... [2020-09-04 23:15:39,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:39, skipping insertion in model container [2020-09-04 23:15:39,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:39" (3/3) ... [2020-09-04 23:15:39,422 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-09-04 23:15:39,434 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:15:39,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:15:39,470 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:15:39,498 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:15:39,499 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:15:39,499 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:15:39,499 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:15:39,499 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:15:39,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:15:39,500 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:15:39,500 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:15:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-09-04 23:15:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-04 23:15:39,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:39,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:39,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-09-04 23:15:39,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:39,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997316355] [2020-09-04 23:15:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:40,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:40,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997316355] [2020-09-04 23:15:40,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:40,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 23:15:40,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491945029] [2020-09-04 23:15:40,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:15:40,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:40,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:15:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:15:40,488 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-09-04 23:15:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:41,435 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-09-04 23:15:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:15:41,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-09-04 23:15:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:41,472 INFO L225 Difference]: With dead ends: 386 [2020-09-04 23:15:41,473 INFO L226 Difference]: Without dead ends: 349 [2020-09-04 23:15:41,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:15:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-04 23:15:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-09-04 23:15:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 23:15:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-09-04 23:15:41,572 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-09-04 23:15:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:41,577 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-09-04 23:15:41,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:15:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-09-04 23:15:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-04 23:15:41,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:41,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:41,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:15:41,591 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-09-04 23:15:41,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:41,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209587144] [2020-09-04 23:15:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:41,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209587144] [2020-09-04 23:15:42,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:42,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:15:42,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877185092] [2020-09-04 23:15:42,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:15:42,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:15:42,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:15:42,034 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-09-04 23:15:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:42,912 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-09-04 23:15:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:15:42,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-04 23:15:42,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:42,924 INFO L225 Difference]: With dead ends: 374 [2020-09-04 23:15:42,924 INFO L226 Difference]: Without dead ends: 349 [2020-09-04 23:15:42,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:15:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-04 23:15:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-04 23:15:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-04 23:15:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-09-04 23:15:43,009 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-09-04 23:15:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:43,012 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-09-04 23:15:43,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:15:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-09-04 23:15:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-04 23:15:43,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:43,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:15:43,026 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-09-04 23:15:43,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:43,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347241836] [2020-09-04 23:15:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:43,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:43,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347241836] [2020-09-04 23:15:43,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:43,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:15:43,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868985040] [2020-09-04 23:15:43,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:15:43,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:15:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:15:43,602 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-09-04 23:15:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:44,501 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-09-04 23:15:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:15:44,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-04 23:15:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:44,504 INFO L225 Difference]: With dead ends: 391 [2020-09-04 23:15:44,505 INFO L226 Difference]: Without dead ends: 366 [2020-09-04 23:15:44,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:15:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-04 23:15:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-04 23:15:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-04 23:15:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-04 23:15:44,544 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-09-04 23:15:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:44,545 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-04 23:15:44,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:15:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-04 23:15:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-04 23:15:44,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:44,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:44,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:15:44,552 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-09-04 23:15:44,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:44,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343738161] [2020-09-04 23:15:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:44,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343738161] [2020-09-04 23:15:44,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:44,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:15:44,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199064311] [2020-09-04 23:15:44,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:15:44,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:15:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:15:44,939 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-09-04 23:15:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:45,964 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-09-04 23:15:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:15:45,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-04 23:15:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:45,969 INFO L225 Difference]: With dead ends: 408 [2020-09-04 23:15:45,969 INFO L226 Difference]: Without dead ends: 383 [2020-09-04 23:15:45,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:15:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-04 23:15:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-04 23:15:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-04 23:15:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-09-04 23:15:46,019 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-09-04 23:15:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:46,020 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-09-04 23:15:46,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:15:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-09-04 23:15:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-04 23:15:46,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:46,023 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:46,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:15:46,024 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-09-04 23:15:46,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:46,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797643632] [2020-09-04 23:15:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:46,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:46,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797643632] [2020-09-04 23:15:46,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:46,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:15:46,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592335949] [2020-09-04 23:15:46,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:15:46,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:15:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:15:46,575 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-09-04 23:15:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:47,656 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-09-04 23:15:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:15:47,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-04 23:15:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:47,661 INFO L225 Difference]: With dead ends: 425 [2020-09-04 23:15:47,661 INFO L226 Difference]: Without dead ends: 400 [2020-09-04 23:15:47,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:15:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-04 23:15:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-04 23:15:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-04 23:15:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-09-04 23:15:47,709 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-09-04 23:15:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:47,710 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-09-04 23:15:47,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:15:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-09-04 23:15:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-04 23:15:47,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:47,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:47,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:15:47,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-09-04 23:15:47,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:47,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46605733] [2020-09-04 23:15:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:48,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:48,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46605733] [2020-09-04 23:15:48,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:48,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:15:48,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971157071] [2020-09-04 23:15:48,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:15:48,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:15:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:15:48,204 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-09-04 23:15:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:49,374 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-09-04 23:15:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:15:49,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-04 23:15:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:49,378 INFO L225 Difference]: With dead ends: 442 [2020-09-04 23:15:49,378 INFO L226 Difference]: Without dead ends: 417 [2020-09-04 23:15:49,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:15:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-04 23:15:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-04 23:15:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-04 23:15:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-04 23:15:49,419 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-09-04 23:15:49,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:49,420 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-04 23:15:49,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:15:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-04 23:15:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-04 23:15:49,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:49,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:49,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:15:49,424 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-09-04 23:15:49,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:49,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979945782] [2020-09-04 23:15:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:49,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:49,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979945782] [2020-09-04 23:15:49,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:15:49,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819936394] [2020-09-04 23:15:49,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:15:49,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:49,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:15:49,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:15:49,994 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-09-04 23:15:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:51,297 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-09-04 23:15:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:15:51,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-04 23:15:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:51,301 INFO L225 Difference]: With dead ends: 459 [2020-09-04 23:15:51,301 INFO L226 Difference]: Without dead ends: 434 [2020-09-04 23:15:51,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:15:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-04 23:15:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-04 23:15:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-04 23:15:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-09-04 23:15:51,340 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-09-04 23:15:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:51,341 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-09-04 23:15:51,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:15:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-09-04 23:15:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-04 23:15:51,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:51,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:51,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:15:51,346 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-09-04 23:15:51,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:51,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327017355] [2020-09-04 23:15:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:51,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327017355] [2020-09-04 23:15:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:15:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519765836] [2020-09-04 23:15:51,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:15:51,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:15:51,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:15:51,917 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-09-04 23:15:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:53,419 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-09-04 23:15:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:15:53,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-04 23:15:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:53,423 INFO L225 Difference]: With dead ends: 476 [2020-09-04 23:15:53,423 INFO L226 Difference]: Without dead ends: 451 [2020-09-04 23:15:53,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:15:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-04 23:15:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-04 23:15:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-04 23:15:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-09-04 23:15:53,472 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-09-04 23:15:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:53,473 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-09-04 23:15:53,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:15:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-09-04 23:15:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-04 23:15:53,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:53,478 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:53,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:15:53,479 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-09-04 23:15:53,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:53,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962955801] [2020-09-04 23:15:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:53,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 35 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:53,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962955801] [2020-09-04 23:15:53,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:53,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:15:53,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928141731] [2020-09-04 23:15:53,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:15:53,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:15:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:15:53,964 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 12 states. [2020-09-04 23:15:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:55,646 INFO L93 Difference]: Finished difference Result 493 states and 496 transitions. [2020-09-04 23:15:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:15:55,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-09-04 23:15:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:55,650 INFO L225 Difference]: With dead ends: 493 [2020-09-04 23:15:55,651 INFO L226 Difference]: Without dead ends: 468 [2020-09-04 23:15:55,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:15:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-04 23:15:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-09-04 23:15:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-04 23:15:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2020-09-04 23:15:55,692 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 436 [2020-09-04 23:15:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:55,693 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2020-09-04 23:15:55,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:15:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2020-09-04 23:15:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-04 23:15:55,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:55,697 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:55,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:15:55,698 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:55,698 INFO L82 PathProgramCache]: Analyzing trace with hash 689191435, now seen corresponding path program 8 times [2020-09-04 23:15:55,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:55,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037368700] [2020-09-04 23:15:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:56,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 40 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:56,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037368700] [2020-09-04 23:15:56,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:56,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:15:56,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577401653] [2020-09-04 23:15:56,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:15:56,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:56,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:15:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:15:56,341 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 13 states. [2020-09-04 23:15:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:58,137 INFO L93 Difference]: Finished difference Result 510 states and 513 transitions. [2020-09-04 23:15:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:15:58,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-09-04 23:15:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:58,143 INFO L225 Difference]: With dead ends: 510 [2020-09-04 23:15:58,143 INFO L226 Difference]: Without dead ends: 485 [2020-09-04 23:15:58,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:15:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-04 23:15:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-09-04 23:15:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-09-04 23:15:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2020-09-04 23:15:58,182 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 453 [2020-09-04 23:15:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:58,183 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2020-09-04 23:15:58,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:15:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2020-09-04 23:15:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-04 23:15:58,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:58,187 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:58,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:15:58,188 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1771270717, now seen corresponding path program 9 times [2020-09-04 23:15:58,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:58,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137690873] [2020-09-04 23:15:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 45 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:58,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137690873] [2020-09-04 23:15:58,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:58,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:15:58,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571428369] [2020-09-04 23:15:58,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:15:58,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:15:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:15:58,785 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 14 states. [2020-09-04 23:16:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:00,735 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2020-09-04 23:16:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:16:00,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-09-04 23:16:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:00,740 INFO L225 Difference]: With dead ends: 527 [2020-09-04 23:16:00,740 INFO L226 Difference]: Without dead ends: 502 [2020-09-04 23:16:00,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:16:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-04 23:16:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-09-04 23:16:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-04 23:16:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2020-09-04 23:16:00,783 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 470 [2020-09-04 23:16:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:00,783 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2020-09-04 23:16:00,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:16:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2020-09-04 23:16:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-04 23:16:00,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:00,787 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:00,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:16:00,788 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1528208309, now seen corresponding path program 10 times [2020-09-04 23:16:00,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:00,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298048361] [2020-09-04 23:16:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:01,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 50 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:01,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298048361] [2020-09-04 23:16:01,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:01,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:16:01,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629015636] [2020-09-04 23:16:01,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:16:01,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:16:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:16:01,427 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 15 states. [2020-09-04 23:16:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:03,565 INFO L93 Difference]: Finished difference Result 544 states and 547 transitions. [2020-09-04 23:16:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:16:03,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-09-04 23:16:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:03,569 INFO L225 Difference]: With dead ends: 544 [2020-09-04 23:16:03,570 INFO L226 Difference]: Without dead ends: 519 [2020-09-04 23:16:03,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:16:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-09-04 23:16:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-09-04 23:16:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-09-04 23:16:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2020-09-04 23:16:03,616 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 487 [2020-09-04 23:16:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:03,617 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2020-09-04 23:16:03,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:16:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2020-09-04 23:16:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-04 23:16:03,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:03,621 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:03,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:16:03,622 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2047864835, now seen corresponding path program 11 times [2020-09-04 23:16:03,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:03,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664132665] [2020-09-04 23:16:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 55 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:04,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664132665] [2020-09-04 23:16:04,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:04,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:16:04,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278707464] [2020-09-04 23:16:04,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:16:04,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:04,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:16:04,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:16:04,379 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 16 states. [2020-09-04 23:16:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:06,712 INFO L93 Difference]: Finished difference Result 561 states and 564 transitions. [2020-09-04 23:16:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:16:06,713 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-09-04 23:16:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:06,716 INFO L225 Difference]: With dead ends: 561 [2020-09-04 23:16:06,717 INFO L226 Difference]: Without dead ends: 536 [2020-09-04 23:16:06,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:16:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-04 23:16:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-04 23:16:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-04 23:16:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2020-09-04 23:16:06,768 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 504 [2020-09-04 23:16:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:06,769 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2020-09-04 23:16:06,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:16:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2020-09-04 23:16:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-09-04 23:16:06,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:06,774 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:06,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:16:06,774 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash 824442507, now seen corresponding path program 12 times [2020-09-04 23:16:06,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:06,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468759187] [2020-09-04 23:16:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:07,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 60 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:07,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468759187] [2020-09-04 23:16:07,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:07,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:16:07,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144580468] [2020-09-04 23:16:07,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:16:07,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:16:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:16:07,500 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 17 states. [2020-09-04 23:16:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:10,089 INFO L93 Difference]: Finished difference Result 578 states and 581 transitions. [2020-09-04 23:16:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:16:10,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-09-04 23:16:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:10,093 INFO L225 Difference]: With dead ends: 578 [2020-09-04 23:16:10,093 INFO L226 Difference]: Without dead ends: 553 [2020-09-04 23:16:10,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:16:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-09-04 23:16:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-09-04 23:16:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-09-04 23:16:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2020-09-04 23:16:10,143 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 521 [2020-09-04 23:16:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:10,143 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2020-09-04 23:16:10,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:16:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2020-09-04 23:16:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-09-04 23:16:10,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:10,148 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:10,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:16:10,149 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1686815299, now seen corresponding path program 13 times [2020-09-04 23:16:10,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:10,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105253240] [2020-09-04 23:16:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:11,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105253240] [2020-09-04 23:16:11,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:11,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:16:11,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90914414] [2020-09-04 23:16:11,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:16:11,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:16:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:16:11,148 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand 18 states. [2020-09-04 23:16:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:13,914 INFO L93 Difference]: Finished difference Result 595 states and 598 transitions. [2020-09-04 23:16:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:16:13,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 538 [2020-09-04 23:16:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:13,918 INFO L225 Difference]: With dead ends: 595 [2020-09-04 23:16:13,918 INFO L226 Difference]: Without dead ends: 570 [2020-09-04 23:16:13,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:16:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-04 23:16:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-09-04 23:16:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-09-04 23:16:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 557 transitions. [2020-09-04 23:16:13,976 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 557 transitions. Word has length 538 [2020-09-04 23:16:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:13,977 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 557 transitions. [2020-09-04 23:16:13,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:16:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 557 transitions. [2020-09-04 23:16:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-09-04 23:16:13,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:13,981 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:13,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:16:13,982 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:13,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1214777547, now seen corresponding path program 14 times [2020-09-04 23:16:13,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:13,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653678895] [2020-09-04 23:16:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 70 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:15,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653678895] [2020-09-04 23:16:15,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:15,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:16:15,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591517492] [2020-09-04 23:16:15,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:16:15,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:16:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:16:15,134 INFO L87 Difference]: Start difference. First operand 556 states and 557 transitions. Second operand 19 states. [2020-09-04 23:16:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:18,212 INFO L93 Difference]: Finished difference Result 612 states and 615 transitions. [2020-09-04 23:16:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:16:18,213 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 555 [2020-09-04 23:16:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:18,216 INFO L225 Difference]: With dead ends: 612 [2020-09-04 23:16:18,216 INFO L226 Difference]: Without dead ends: 587 [2020-09-04 23:16:18,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:16:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-09-04 23:16:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 573. [2020-09-04 23:16:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-09-04 23:16:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 574 transitions. [2020-09-04 23:16:18,258 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 574 transitions. Word has length 555 [2020-09-04 23:16:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:18,259 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 574 transitions. [2020-09-04 23:16:18,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:16:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 574 transitions. [2020-09-04 23:16:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-09-04 23:16:18,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:18,263 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:18,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:16:18,263 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1275001725, now seen corresponding path program 15 times [2020-09-04 23:16:18,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:18,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54853937] [2020-09-04 23:16:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1935 backedges. 75 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:19,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54853937] [2020-09-04 23:16:19,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:19,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:16:19,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336475391] [2020-09-04 23:16:19,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:16:19,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:16:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:16:19,203 INFO L87 Difference]: Start difference. First operand 573 states and 574 transitions. Second operand 20 states. [2020-09-04 23:16:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:22,465 INFO L93 Difference]: Finished difference Result 629 states and 632 transitions. [2020-09-04 23:16:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:16:22,467 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2020-09-04 23:16:22,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:22,471 INFO L225 Difference]: With dead ends: 629 [2020-09-04 23:16:22,471 INFO L226 Difference]: Without dead ends: 604 [2020-09-04 23:16:22,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:16:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-04 23:16:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2020-09-04 23:16:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-09-04 23:16:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 591 transitions. [2020-09-04 23:16:22,530 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 591 transitions. Word has length 572 [2020-09-04 23:16:22,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:22,531 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 591 transitions. [2020-09-04 23:16:22,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:16:22,531 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 591 transitions. [2020-09-04 23:16:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-09-04 23:16:22,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:22,536 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:22,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:16:22,537 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1134984437, now seen corresponding path program 16 times [2020-09-04 23:16:22,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:22,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356706223] [2020-09-04 23:16:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:23,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 80 proven. 2120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:23,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356706223] [2020-09-04 23:16:23,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:23,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-04 23:16:23,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716099610] [2020-09-04 23:16:23,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 23:16:23,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:23,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 23:16:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:16:23,529 INFO L87 Difference]: Start difference. First operand 590 states and 591 transitions. Second operand 21 states. [2020-09-04 23:16:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:27,135 INFO L93 Difference]: Finished difference Result 646 states and 649 transitions. [2020-09-04 23:16:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:16:27,136 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 589 [2020-09-04 23:16:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:27,140 INFO L225 Difference]: With dead ends: 646 [2020-09-04 23:16:27,140 INFO L226 Difference]: Without dead ends: 621 [2020-09-04 23:16:27,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:16:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-09-04 23:16:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-09-04 23:16:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-09-04 23:16:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 608 transitions. [2020-09-04 23:16:27,194 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 608 transitions. Word has length 589 [2020-09-04 23:16:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:27,194 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 608 transitions. [2020-09-04 23:16:27,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 23:16:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 608 transitions. [2020-09-04 23:16:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-09-04 23:16:27,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:27,198 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:27,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:16:27,198 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1033287363, now seen corresponding path program 17 times [2020-09-04 23:16:27,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:27,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880353692] [2020-09-04 23:16:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:27,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2482 backedges. 85 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:28,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880353692] [2020-09-04 23:16:28,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:28,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:16:28,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513995287] [2020-09-04 23:16:28,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:16:28,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:16:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:16:28,254 INFO L87 Difference]: Start difference. First operand 607 states and 608 transitions. Second operand 22 states. [2020-09-04 23:16:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:32,131 INFO L93 Difference]: Finished difference Result 663 states and 666 transitions. [2020-09-04 23:16:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:16:32,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 606 [2020-09-04 23:16:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:32,136 INFO L225 Difference]: With dead ends: 663 [2020-09-04 23:16:32,136 INFO L226 Difference]: Without dead ends: 638 [2020-09-04 23:16:32,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:16:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-04 23:16:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 624. [2020-09-04 23:16:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-09-04 23:16:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 625 transitions. [2020-09-04 23:16:32,188 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 625 transitions. Word has length 606 [2020-09-04 23:16:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:32,189 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 625 transitions. [2020-09-04 23:16:32,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:16:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 625 transitions. [2020-09-04 23:16:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-09-04 23:16:32,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:32,195 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:32,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:16:32,195 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash -174297781, now seen corresponding path program 18 times [2020-09-04 23:16:32,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:32,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969313717] [2020-09-04 23:16:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 90 proven. 2691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:33,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969313717] [2020-09-04 23:16:33,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:33,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 23:16:33,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875938210] [2020-09-04 23:16:33,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 23:16:33,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:33,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 23:16:33,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:16:33,325 INFO L87 Difference]: Start difference. First operand 624 states and 625 transitions. Second operand 23 states. [2020-09-04 23:16:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:37,546 INFO L93 Difference]: Finished difference Result 680 states and 683 transitions. [2020-09-04 23:16:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 23:16:37,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 623 [2020-09-04 23:16:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:37,550 INFO L225 Difference]: With dead ends: 680 [2020-09-04 23:16:37,551 INFO L226 Difference]: Without dead ends: 655 [2020-09-04 23:16:37,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:16:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-09-04 23:16:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 641. [2020-09-04 23:16:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-09-04 23:16:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 642 transitions. [2020-09-04 23:16:37,610 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 642 transitions. Word has length 623 [2020-09-04 23:16:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:37,611 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 642 transitions. [2020-09-04 23:16:37,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 23:16:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 642 transitions. [2020-09-04 23:16:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2020-09-04 23:16:37,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:37,617 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:37,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:16:37,617 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1922049789, now seen corresponding path program 19 times [2020-09-04 23:16:37,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:37,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437456857] [2020-09-04 23:16:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 95 proven. 3002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:38,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437456857] [2020-09-04 23:16:38,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:38,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:16:38,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241437602] [2020-09-04 23:16:38,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:16:38,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:16:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:16:38,834 INFO L87 Difference]: Start difference. First operand 641 states and 642 transitions. Second operand 24 states. [2020-09-04 23:16:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:43,431 INFO L93 Difference]: Finished difference Result 697 states and 700 transitions. [2020-09-04 23:16:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:16:43,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 640 [2020-09-04 23:16:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:43,436 INFO L225 Difference]: With dead ends: 697 [2020-09-04 23:16:43,436 INFO L226 Difference]: Without dead ends: 672 [2020-09-04 23:16:43,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:16:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2020-09-04 23:16:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 658. [2020-09-04 23:16:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-09-04 23:16:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 659 transitions. [2020-09-04 23:16:43,502 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 659 transitions. Word has length 640 [2020-09-04 23:16:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:43,502 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 659 transitions. [2020-09-04 23:16:43,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:16:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 659 transitions. [2020-09-04 23:16:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2020-09-04 23:16:43,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:43,506 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:43,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:16:43,507 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash 869582731, now seen corresponding path program 20 times [2020-09-04 23:16:43,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:43,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017491501] [2020-09-04 23:16:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:44,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 100 proven. 3330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:45,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017491501] [2020-09-04 23:16:45,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 23:16:45,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848844986] [2020-09-04 23:16:45,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 23:16:45,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:45,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 23:16:45,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:16:45,285 INFO L87 Difference]: Start difference. First operand 658 states and 659 transitions. Second operand 25 states. [2020-09-04 23:16:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:50,238 INFO L93 Difference]: Finished difference Result 714 states and 717 transitions. [2020-09-04 23:16:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 23:16:50,241 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 657 [2020-09-04 23:16:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:50,244 INFO L225 Difference]: With dead ends: 714 [2020-09-04 23:16:50,244 INFO L226 Difference]: Without dead ends: 689 [2020-09-04 23:16:50,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:16:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2020-09-04 23:16:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 675. [2020-09-04 23:16:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-09-04 23:16:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 676 transitions. [2020-09-04 23:16:50,319 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 676 transitions. Word has length 657 [2020-09-04 23:16:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:50,320 INFO L479 AbstractCegarLoop]: Abstraction has 675 states and 676 transitions. [2020-09-04 23:16:50,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 23:16:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 676 transitions. [2020-09-04 23:16:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-09-04 23:16:50,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:50,326 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:50,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:16:50,326 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -649096003, now seen corresponding path program 21 times [2020-09-04 23:16:50,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:50,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212406313] [2020-09-04 23:16:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:51,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 105 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:51,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212406313] [2020-09-04 23:16:51,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:51,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:16:51,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934664575] [2020-09-04 23:16:51,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:16:51,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:16:51,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:16:51,756 INFO L87 Difference]: Start difference. First operand 675 states and 676 transitions. Second operand 26 states. [2020-09-04 23:16:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:57,154 INFO L93 Difference]: Finished difference Result 731 states and 734 transitions. [2020-09-04 23:16:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:16:57,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 674 [2020-09-04 23:16:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:57,159 INFO L225 Difference]: With dead ends: 731 [2020-09-04 23:16:57,159 INFO L226 Difference]: Without dead ends: 706 [2020-09-04 23:16:57,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:16:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-09-04 23:16:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 692. [2020-09-04 23:16:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-04 23:16:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 693 transitions. [2020-09-04 23:16:57,260 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 693 transitions. Word has length 674 [2020-09-04 23:16:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:57,260 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 693 transitions. [2020-09-04 23:16:57,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:16:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 693 transitions. [2020-09-04 23:16:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2020-09-04 23:16:57,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:57,274 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:57,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:16:57,275 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash -844721717, now seen corresponding path program 22 times [2020-09-04 23:16:57,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:57,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054841730] [2020-09-04 23:16:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 110 proven. 4037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:58,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054841730] [2020-09-04 23:16:58,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:58,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 23:16:58,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181661887] [2020-09-04 23:16:58,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 23:16:58,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 23:16:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:16:58,782 INFO L87 Difference]: Start difference. First operand 692 states and 693 transitions. Second operand 27 states. [2020-09-04 23:17:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:04,613 INFO L93 Difference]: Finished difference Result 748 states and 751 transitions. [2020-09-04 23:17:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 23:17:04,614 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 691 [2020-09-04 23:17:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:04,618 INFO L225 Difference]: With dead ends: 748 [2020-09-04 23:17:04,618 INFO L226 Difference]: Without dead ends: 723 [2020-09-04 23:17:04,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:17:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-09-04 23:17:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 709. [2020-09-04 23:17:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-09-04 23:17:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 710 transitions. [2020-09-04 23:17:04,723 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 710 transitions. Word has length 691 [2020-09-04 23:17:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:04,723 INFO L479 AbstractCegarLoop]: Abstraction has 709 states and 710 transitions. [2020-09-04 23:17:04,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 23:17:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 710 transitions. [2020-09-04 23:17:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-09-04 23:17:04,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:04,730 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:04,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:17:04,730 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1015255677, now seen corresponding path program 23 times [2020-09-04 23:17:04,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:04,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882093938] [2020-09-04 23:17:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:05,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 115 proven. 4416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:06,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882093938] [2020-09-04 23:17:06,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:06,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:17:06,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166306727] [2020-09-04 23:17:06,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:17:06,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:17:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:17:06,334 INFO L87 Difference]: Start difference. First operand 709 states and 710 transitions. Second operand 28 states. [2020-09-04 23:17:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:12,681 INFO L93 Difference]: Finished difference Result 765 states and 768 transitions. [2020-09-04 23:17:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:17:12,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 708 [2020-09-04 23:17:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:12,685 INFO L225 Difference]: With dead ends: 765 [2020-09-04 23:17:12,685 INFO L226 Difference]: Without dead ends: 740 [2020-09-04 23:17:12,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:17:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-09-04 23:17:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 726. [2020-09-04 23:17:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 726 states. [2020-09-04 23:17:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 727 transitions. [2020-09-04 23:17:12,769 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 727 transitions. Word has length 708 [2020-09-04 23:17:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:12,770 INFO L479 AbstractCegarLoop]: Abstraction has 726 states and 727 transitions. [2020-09-04 23:17:12,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:17:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 727 transitions. [2020-09-04 23:17:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2020-09-04 23:17:12,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:12,775 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:12,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:17:12,775 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1890962443, now seen corresponding path program 24 times [2020-09-04 23:17:12,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:12,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532011709] [2020-09-04 23:17:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:13,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 120 proven. 4812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:14,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532011709] [2020-09-04 23:17:14,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:14,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 23:17:14,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020406547] [2020-09-04 23:17:14,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 23:17:14,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 23:17:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:17:14,423 INFO L87 Difference]: Start difference. First operand 726 states and 727 transitions. Second operand 29 states. [2020-09-04 23:17:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:21,321 INFO L93 Difference]: Finished difference Result 782 states and 785 transitions. [2020-09-04 23:17:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 23:17:21,323 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 725 [2020-09-04 23:17:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:21,326 INFO L225 Difference]: With dead ends: 782 [2020-09-04 23:17:21,326 INFO L226 Difference]: Without dead ends: 757 [2020-09-04 23:17:21,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:17:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-09-04 23:17:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 743. [2020-09-04 23:17:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-09-04 23:17:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 744 transitions. [2020-09-04 23:17:21,432 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 744 transitions. Word has length 725 [2020-09-04 23:17:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:21,432 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 744 transitions. [2020-09-04 23:17:21,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 23:17:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 744 transitions. [2020-09-04 23:17:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 743 [2020-09-04 23:17:21,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:21,437 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:21,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:17:21,437 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1795694653, now seen corresponding path program 25 times [2020-09-04 23:17:21,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:21,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134659329] [2020-09-04 23:17:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:22,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5350 backedges. 125 proven. 5225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:23,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134659329] [2020-09-04 23:17:23,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:23,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:17:23,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195654428] [2020-09-04 23:17:23,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:17:23,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:17:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:17:23,273 INFO L87 Difference]: Start difference. First operand 743 states and 744 transitions. Second operand 30 states. [2020-09-04 23:17:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:30,735 INFO L93 Difference]: Finished difference Result 799 states and 802 transitions. [2020-09-04 23:17:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:17:30,737 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 742 [2020-09-04 23:17:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:30,740 INFO L225 Difference]: With dead ends: 799 [2020-09-04 23:17:30,740 INFO L226 Difference]: Without dead ends: 774 [2020-09-04 23:17:30,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:17:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-09-04 23:17:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 760. [2020-09-04 23:17:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-09-04 23:17:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 761 transitions. [2020-09-04 23:17:30,840 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 761 transitions. Word has length 742 [2020-09-04 23:17:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:30,840 INFO L479 AbstractCegarLoop]: Abstraction has 760 states and 761 transitions. [2020-09-04 23:17:30,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:17:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 761 transitions. [2020-09-04 23:17:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2020-09-04 23:17:30,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:30,846 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:30,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:17:30,846 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1638299211, now seen corresponding path program 26 times [2020-09-04 23:17:30,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:30,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26430039] [2020-09-04 23:17:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:32,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5785 backedges. 130 proven. 5655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:32,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26430039] [2020-09-04 23:17:32,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:32,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-04 23:17:32,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714652711] [2020-09-04 23:17:32,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 23:17:32,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:32,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 23:17:32,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:17:32,747 INFO L87 Difference]: Start difference. First operand 760 states and 761 transitions. Second operand 31 states. [2020-09-04 23:17:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:40,857 INFO L93 Difference]: Finished difference Result 816 states and 819 transitions. [2020-09-04 23:17:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 23:17:40,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 759 [2020-09-04 23:17:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:40,862 INFO L225 Difference]: With dead ends: 816 [2020-09-04 23:17:40,862 INFO L226 Difference]: Without dead ends: 791 [2020-09-04 23:17:40,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 23:17:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2020-09-04 23:17:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 777. [2020-09-04 23:17:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-09-04 23:17:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 778 transitions. [2020-09-04 23:17:40,962 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 778 transitions. Word has length 759 [2020-09-04 23:17:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:40,963 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 778 transitions. [2020-09-04 23:17:40,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 23:17:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 778 transitions. [2020-09-04 23:17:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2020-09-04 23:17:40,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:40,968 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:40,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:17:40,968 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2092514813, now seen corresponding path program 27 times [2020-09-04 23:17:40,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:40,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672553427] [2020-09-04 23:17:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:42,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6237 backedges. 135 proven. 6102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:42,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672553427] [2020-09-04 23:17:42,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:42,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:17:42,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150379742] [2020-09-04 23:17:42,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:17:42,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:42,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:17:42,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:17:42,958 INFO L87 Difference]: Start difference. First operand 777 states and 778 transitions. Second operand 32 states. [2020-09-04 23:17:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:51,844 INFO L93 Difference]: Finished difference Result 833 states and 836 transitions. [2020-09-04 23:17:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 23:17:51,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 776 [2020-09-04 23:17:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:51,850 INFO L225 Difference]: With dead ends: 833 [2020-09-04 23:17:51,850 INFO L226 Difference]: Without dead ends: 808 [2020-09-04 23:17:51,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:17:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-09-04 23:17:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 794. [2020-09-04 23:17:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-09-04 23:17:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 795 transitions. [2020-09-04 23:17:51,952 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 795 transitions. Word has length 776 [2020-09-04 23:17:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:51,952 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 795 transitions. [2020-09-04 23:17:51,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:17:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 795 transitions. [2020-09-04 23:17:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2020-09-04 23:17:51,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:51,958 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:51,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:17:51,958 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1138978677, now seen corresponding path program 28 times [2020-09-04 23:17:51,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:51,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319744591] [2020-09-04 23:17:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 140 proven. 6566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:54,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319744591] [2020-09-04 23:17:54,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:54,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 23:17:54,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744039048] [2020-09-04 23:17:54,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 23:17:54,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 23:17:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:17:54,159 INFO L87 Difference]: Start difference. First operand 794 states and 795 transitions. Second operand 33 states. [2020-09-04 23:18:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:03,861 INFO L93 Difference]: Finished difference Result 850 states and 853 transitions. [2020-09-04 23:18:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 23:18:03,863 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 793 [2020-09-04 23:18:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:03,867 INFO L225 Difference]: With dead ends: 850 [2020-09-04 23:18:03,867 INFO L226 Difference]: Without dead ends: 825 [2020-09-04 23:18:03,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:18:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-09-04 23:18:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 811. [2020-09-04 23:18:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-09-04 23:18:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 812 transitions. [2020-09-04 23:18:03,968 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 812 transitions. Word has length 793 [2020-09-04 23:18:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:03,970 INFO L479 AbstractCegarLoop]: Abstraction has 811 states and 812 transitions. [2020-09-04 23:18:03,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 23:18:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 812 transitions. [2020-09-04 23:18:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-09-04 23:18:03,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:03,976 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:03,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:18:03,976 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1837962307, now seen corresponding path program 29 times [2020-09-04 23:18:03,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:03,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85524805] [2020-09-04 23:18:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 145 proven. 7047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:06,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85524805] [2020-09-04 23:18:06,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:06,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:18:06,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84826463] [2020-09-04 23:18:06,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:18:06,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:18:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:18:06,216 INFO L87 Difference]: Start difference. First operand 811 states and 812 transitions. Second operand 34 states. [2020-09-04 23:18:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:16,725 INFO L93 Difference]: Finished difference Result 867 states and 870 transitions. [2020-09-04 23:18:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:18:16,726 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 810 [2020-09-04 23:18:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:16,730 INFO L225 Difference]: With dead ends: 867 [2020-09-04 23:18:16,730 INFO L226 Difference]: Without dead ends: 842 [2020-09-04 23:18:16,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:18:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-09-04 23:18:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 828. [2020-09-04 23:18:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-09-04 23:18:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 829 transitions. [2020-09-04 23:18:16,829 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 829 transitions. Word has length 810 [2020-09-04 23:18:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:16,829 INFO L479 AbstractCegarLoop]: Abstraction has 828 states and 829 transitions. [2020-09-04 23:18:16,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:18:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 829 transitions. [2020-09-04 23:18:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2020-09-04 23:18:16,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:16,836 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:16,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:18:16,836 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1296295221, now seen corresponding path program 30 times [2020-09-04 23:18:16,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:16,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546830331] [2020-09-04 23:18:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:18,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 150 proven. 7545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:19,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546830331] [2020-09-04 23:18:19,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:19,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-04 23:18:19,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550088659] [2020-09-04 23:18:19,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 23:18:19,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 23:18:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:18:19,241 INFO L87 Difference]: Start difference. First operand 828 states and 829 transitions. Second operand 35 states. [2020-09-04 23:18:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:30,823 INFO L93 Difference]: Finished difference Result 884 states and 887 transitions. [2020-09-04 23:18:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-04 23:18:30,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 827 [2020-09-04 23:18:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:30,829 INFO L225 Difference]: With dead ends: 884 [2020-09-04 23:18:30,829 INFO L226 Difference]: Without dead ends: 859 [2020-09-04 23:18:30,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:18:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-09-04 23:18:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 845. [2020-09-04 23:18:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 845 states. [2020-09-04 23:18:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 846 transitions. [2020-09-04 23:18:30,963 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 846 transitions. Word has length 827 [2020-09-04 23:18:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:30,964 INFO L479 AbstractCegarLoop]: Abstraction has 845 states and 846 transitions. [2020-09-04 23:18:30,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 23:18:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 846 transitions. [2020-09-04 23:18:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2020-09-04 23:18:30,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:30,973 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:30,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:18:30,974 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1777260163, now seen corresponding path program 31 times [2020-09-04 23:18:30,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:30,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023774431] [2020-09-04 23:18:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8215 backedges. 155 proven. 8060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:33,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023774431] [2020-09-04 23:18:33,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:33,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:18:33,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174273313] [2020-09-04 23:18:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:18:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:18:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:18:33,562 INFO L87 Difference]: Start difference. First operand 845 states and 846 transitions. Second operand 36 states. [2020-09-04 23:18:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:46,279 INFO L93 Difference]: Finished difference Result 901 states and 904 transitions. [2020-09-04 23:18:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:18:46,281 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 844 [2020-09-04 23:18:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:46,285 INFO L225 Difference]: With dead ends: 901 [2020-09-04 23:18:46,285 INFO L226 Difference]: Without dead ends: 876 [2020-09-04 23:18:46,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:18:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-09-04 23:18:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 862. [2020-09-04 23:18:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 862 states. [2020-09-04 23:18:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 863 transitions. [2020-09-04 23:18:46,404 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 863 transitions. Word has length 844 [2020-09-04 23:18:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:46,405 INFO L479 AbstractCegarLoop]: Abstraction has 862 states and 863 transitions. [2020-09-04 23:18:46,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:18:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 863 transitions. [2020-09-04 23:18:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2020-09-04 23:18:46,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:46,412 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:46,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:18:46,412 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash -819391221, now seen corresponding path program 32 times [2020-09-04 23:18:46,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:46,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093577218] [2020-09-04 23:18:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:48,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8752 backedges. 160 proven. 8592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:49,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093577218] [2020-09-04 23:18:49,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:49,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-04 23:18:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560884274] [2020-09-04 23:18:49,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 23:18:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 23:18:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:18:49,203 INFO L87 Difference]: Start difference. First operand 862 states and 863 transitions. Second operand 37 states. [2020-09-04 23:19:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:03,213 INFO L93 Difference]: Finished difference Result 918 states and 921 transitions. [2020-09-04 23:19:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 23:19:03,214 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 861 [2020-09-04 23:19:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:03,220 INFO L225 Difference]: With dead ends: 918 [2020-09-04 23:19:03,220 INFO L226 Difference]: Without dead ends: 893 [2020-09-04 23:19:03,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:19:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-09-04 23:19:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 879. [2020-09-04 23:19:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-09-04 23:19:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 880 transitions. [2020-09-04 23:19:03,387 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 880 transitions. Word has length 861 [2020-09-04 23:19:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:03,388 INFO L479 AbstractCegarLoop]: Abstraction has 879 states and 880 transitions. [2020-09-04 23:19:03,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 23:19:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 880 transitions. [2020-09-04 23:19:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2020-09-04 23:19:03,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:03,395 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:03,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:19:03,395 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:03,396 INFO L82 PathProgramCache]: Analyzing trace with hash -93325507, now seen corresponding path program 33 times [2020-09-04 23:19:03,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:03,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729558237] [2020-09-04 23:19:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:05,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9306 backedges. 165 proven. 9141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729558237] [2020-09-04 23:19:06,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:06,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:19:06,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926777385] [2020-09-04 23:19:06,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:19:06,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:19:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:19:06,380 INFO L87 Difference]: Start difference. First operand 879 states and 880 transitions. Second operand 38 states. [2020-09-04 23:19:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:21,842 INFO L93 Difference]: Finished difference Result 935 states and 938 transitions. [2020-09-04 23:19:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 23:19:21,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 878 [2020-09-04 23:19:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:21,847 INFO L225 Difference]: With dead ends: 935 [2020-09-04 23:19:21,847 INFO L226 Difference]: Without dead ends: 910 [2020-09-04 23:19:21,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:19:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-09-04 23:19:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 896. [2020-09-04 23:19:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-09-04 23:19:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 897 transitions. [2020-09-04 23:19:21,974 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 897 transitions. Word has length 878 [2020-09-04 23:19:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:21,975 INFO L479 AbstractCegarLoop]: Abstraction has 896 states and 897 transitions. [2020-09-04 23:19:21,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:19:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 897 transitions. [2020-09-04 23:19:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2020-09-04 23:19:21,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:21,986 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:21,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:19:21,987 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash 839352139, now seen corresponding path program 34 times [2020-09-04 23:19:21,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:21,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318926954] [2020-09-04 23:19:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:24,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9877 backedges. 170 proven. 9707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:25,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318926954] [2020-09-04 23:19:25,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:25,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-04 23:19:25,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533637293] [2020-09-04 23:19:25,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 23:19:25,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:25,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 23:19:25,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:19:25,107 INFO L87 Difference]: Start difference. First operand 896 states and 897 transitions. Second operand 39 states. [2020-09-04 23:19:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:42,013 INFO L93 Difference]: Finished difference Result 952 states and 955 transitions. [2020-09-04 23:19:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 23:19:42,015 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 895 [2020-09-04 23:19:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:42,020 INFO L225 Difference]: With dead ends: 952 [2020-09-04 23:19:42,020 INFO L226 Difference]: Without dead ends: 927 [2020-09-04 23:19:42,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:19:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-09-04 23:19:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 913. [2020-09-04 23:19:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-09-04 23:19:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 914 transitions. [2020-09-04 23:19:42,160 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 914 transitions. Word has length 895 [2020-09-04 23:19:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:42,161 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 914 transitions. [2020-09-04 23:19:42,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 23:19:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 914 transitions. [2020-09-04 23:19:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 913 [2020-09-04 23:19:42,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:42,169 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:42,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:19:42,169 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2070631677, now seen corresponding path program 35 times [2020-09-04 23:19:42,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:42,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105572687] [2020-09-04 23:19:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:44,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 175 proven. 10290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:45,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105572687] [2020-09-04 23:19:45,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:45,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:19:45,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453690804] [2020-09-04 23:19:45,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:19:45,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:19:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:19:45,541 INFO L87 Difference]: Start difference. First operand 913 states and 914 transitions. Second operand 40 states. [2020-09-04 23:20:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:04,653 INFO L93 Difference]: Finished difference Result 969 states and 972 transitions. [2020-09-04 23:20:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:20:04,655 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 912 [2020-09-04 23:20:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:04,659 INFO L225 Difference]: With dead ends: 969 [2020-09-04 23:20:04,659 INFO L226 Difference]: Without dead ends: 944 [2020-09-04 23:20:04,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:20:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-09-04 23:20:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 930. [2020-09-04 23:20:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-09-04 23:20:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 931 transitions. [2020-09-04 23:20:04,797 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 931 transitions. Word has length 912 [2020-09-04 23:20:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:04,798 INFO L479 AbstractCegarLoop]: Abstraction has 930 states and 931 transitions. [2020-09-04 23:20:04,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:20:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 931 transitions. [2020-09-04 23:20:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2020-09-04 23:20:04,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:04,811 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:04,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:20:04,812 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash -755279477, now seen corresponding path program 36 times [2020-09-04 23:20:04,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:04,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681558713] [2020-09-04 23:20:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11070 backedges. 180 proven. 10890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:08,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681558713] [2020-09-04 23:20:08,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:08,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 23:20:08,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901114861] [2020-09-04 23:20:08,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 23:20:08,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 23:20:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:20:08,682 INFO L87 Difference]: Start difference. First operand 930 states and 931 transitions. Second operand 41 states. [2020-09-04 23:20:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:30,308 INFO L93 Difference]: Finished difference Result 986 states and 989 transitions. [2020-09-04 23:20:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-04 23:20:30,310 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 929 [2020-09-04 23:20:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:30,315 INFO L225 Difference]: With dead ends: 986 [2020-09-04 23:20:30,315 INFO L226 Difference]: Without dead ends: 961 [2020-09-04 23:20:30,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:20:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-09-04 23:20:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 947. [2020-09-04 23:20:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 947 states. [2020-09-04 23:20:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 948 transitions. [2020-09-04 23:20:30,461 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 948 transitions. Word has length 929 [2020-09-04 23:20:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:30,462 INFO L479 AbstractCegarLoop]: Abstraction has 947 states and 948 transitions. [2020-09-04 23:20:30,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 23:20:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 948 transitions. [2020-09-04 23:20:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-09-04 23:20:30,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:30,476 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:30,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:20:30,476 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash -572570947, now seen corresponding path program 37 times [2020-09-04 23:20:30,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:30,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237972133] [2020-09-04 23:20:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:33,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11692 backedges. 185 proven. 11507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:34,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237972133] [2020-09-04 23:20:34,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:34,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:20:34,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648108062] [2020-09-04 23:20:34,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:20:34,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:20:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:20:34,707 INFO L87 Difference]: Start difference. First operand 947 states and 948 transitions. Second operand 42 states. [2020-09-04 23:20:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:58,364 INFO L93 Difference]: Finished difference Result 1003 states and 1006 transitions. [2020-09-04 23:20:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:20:58,366 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 946 [2020-09-04 23:20:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:58,372 INFO L225 Difference]: With dead ends: 1003 [2020-09-04 23:20:58,372 INFO L226 Difference]: Without dead ends: 978 [2020-09-04 23:20:58,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:20:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2020-09-04 23:20:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 964. [2020-09-04 23:20:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2020-09-04 23:20:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 965 transitions. [2020-09-04 23:20:58,535 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 965 transitions. Word has length 946 [2020-09-04 23:20:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:58,536 INFO L479 AbstractCegarLoop]: Abstraction has 964 states and 965 transitions. [2020-09-04 23:20:58,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:20:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 965 transitions. [2020-09-04 23:20:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2020-09-04 23:20:58,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:58,545 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:58,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:20:58,545 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1062689845, now seen corresponding path program 38 times [2020-09-04 23:20:58,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:58,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782381442] [2020-09-04 23:20:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12331 backedges. 190 proven. 12141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:03,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782381442] [2020-09-04 23:21:03,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:03,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-04 23:21:03,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019453193] [2020-09-04 23:21:03,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 23:21:03,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 23:21:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:21:03,414 INFO L87 Difference]: Start difference. First operand 964 states and 965 transitions. Second operand 43 states. [2020-09-04 23:21:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:31,144 INFO L93 Difference]: Finished difference Result 1020 states and 1023 transitions. [2020-09-04 23:21:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 23:21:31,147 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 963 [2020-09-04 23:21:31,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:31,151 INFO L225 Difference]: With dead ends: 1020 [2020-09-04 23:21:31,151 INFO L226 Difference]: Without dead ends: 995 [2020-09-04 23:21:31,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:21:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-09-04 23:21:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 981. [2020-09-04 23:21:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-09-04 23:21:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 982 transitions. [2020-09-04 23:21:31,313 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 982 transitions. Word has length 963 [2020-09-04 23:21:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:31,314 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 982 transitions. [2020-09-04 23:21:31,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 23:21:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 982 transitions. [2020-09-04 23:21:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-09-04 23:21:31,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:31,323 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:31,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:21:31,324 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1347960707, now seen corresponding path program 39 times [2020-09-04 23:21:31,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:31,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381883494] [2020-09-04 23:21:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:35,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 195 proven. 12792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:36,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381883494] [2020-09-04 23:21:36,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:36,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:21:36,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714056543] [2020-09-04 23:21:36,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:21:36,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:21:36,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:21:36,185 INFO L87 Difference]: Start difference. First operand 981 states and 982 transitions. Second operand 44 states. [2020-09-04 23:22:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:04,995 INFO L93 Difference]: Finished difference Result 1037 states and 1040 transitions. [2020-09-04 23:22:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 23:22:04,998 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 980 [2020-09-04 23:22:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:05,005 INFO L225 Difference]: With dead ends: 1037 [2020-09-04 23:22:05,005 INFO L226 Difference]: Without dead ends: 1012 [2020-09-04 23:22:05,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:22:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-09-04 23:22:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 998. [2020-09-04 23:22:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-09-04 23:22:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 999 transitions. [2020-09-04 23:22:05,232 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 999 transitions. Word has length 980 [2020-09-04 23:22:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:05,233 INFO L479 AbstractCegarLoop]: Abstraction has 998 states and 999 transitions. [2020-09-04 23:22:05,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:22:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 999 transitions. [2020-09-04 23:22:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2020-09-04 23:22:05,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:05,241 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:05,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:22:05,242 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1622367755, now seen corresponding path program 40 times [2020-09-04 23:22:05,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:05,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423801698] [2020-09-04 23:22:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:08,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 200 proven. 13460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:09,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423801698] [2020-09-04 23:22:09,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:09,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-04 23:22:09,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865889576] [2020-09-04 23:22:09,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 23:22:09,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 23:22:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:22:09,893 INFO L87 Difference]: Start difference. First operand 998 states and 999 transitions. Second operand 45 states. [2020-09-04 23:22:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:36,809 INFO L93 Difference]: Finished difference Result 1054 states and 1057 transitions. [2020-09-04 23:22:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 23:22:36,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 997 [2020-09-04 23:22:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:36,817 INFO L225 Difference]: With dead ends: 1054 [2020-09-04 23:22:36,817 INFO L226 Difference]: Without dead ends: 1029 [2020-09-04 23:22:36,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:22:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-09-04 23:22:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1015. [2020-09-04 23:22:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-09-04 23:22:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1016 transitions. [2020-09-04 23:22:36,982 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1016 transitions. Word has length 997 [2020-09-04 23:22:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:36,983 INFO L479 AbstractCegarLoop]: Abstraction has 1015 states and 1016 transitions. [2020-09-04 23:22:36,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 23:22:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1016 transitions. [2020-09-04 23:22:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1015 [2020-09-04 23:22:36,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:36,991 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:36,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:22:36,992 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash 127979069, now seen corresponding path program 41 times [2020-09-04 23:22:36,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:36,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907105021] [2020-09-04 23:22:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:40,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14350 backedges. 205 proven. 14145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:41,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907105021] [2020-09-04 23:22:41,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:41,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:22:41,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751792426] [2020-09-04 23:22:41,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:22:41,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:22:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:22:41,957 INFO L87 Difference]: Start difference. First operand 1015 states and 1016 transitions. Second operand 46 states. [2020-09-04 23:23:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:12,008 INFO L93 Difference]: Finished difference Result 1071 states and 1074 transitions. [2020-09-04 23:23:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:23:12,012 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1014 [2020-09-04 23:23:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:12,017 INFO L225 Difference]: With dead ends: 1071 [2020-09-04 23:23:12,018 INFO L226 Difference]: Without dead ends: 1046 [2020-09-04 23:23:12,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:23:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2020-09-04 23:23:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1032. [2020-09-04 23:23:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-09-04 23:23:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1033 transitions. [2020-09-04 23:23:12,202 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1033 transitions. Word has length 1014 [2020-09-04 23:23:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:12,203 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1033 transitions. [2020-09-04 23:23:12,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:23:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1033 transitions. [2020-09-04 23:23:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2020-09-04 23:23:12,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:12,212 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:12,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:23:12,213 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1346402229, now seen corresponding path program 42 times [2020-09-04 23:23:12,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:12,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181111179] [2020-09-04 23:23:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15057 backedges. 543 proven. 14514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:23:21,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181111179] [2020-09-04 23:23:21,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:21,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:23:21,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936743269] [2020-09-04 23:23:21,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:23:21,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:23:21,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:23:21,410 INFO L87 Difference]: Start difference. First operand 1032 states and 1033 transitions. Second operand 50 states. [2020-09-04 23:23:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:57,161 INFO L93 Difference]: Finished difference Result 1041 states and 1042 transitions. [2020-09-04 23:23:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:23:57,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 1031 [2020-09-04 23:23:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:57,163 INFO L225 Difference]: With dead ends: 1041 [2020-09-04 23:23:57,163 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:23:57,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=166, Invalid=2590, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:23:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:23:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:23:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:23:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:23:57,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1031 [2020-09-04 23:23:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:57,167 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:23:57,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:23:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:23:57,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:23:57,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:23:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:23:58,528 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:23:58,651 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:01,139 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:01,404 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:02,124 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:03,821 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:03,936 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:05,605 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 229 [2020-09-04 23:24:21,468 WARN L193 SmtUtils]: Spent 15.86 s on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2020-09-04 23:24:22,964 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 220 [2020-09-04 23:24:25,013 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:25,272 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:27,676 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:27,790 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:29,411 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 229 [2020-09-04 23:24:44,566 WARN L193 SmtUtils]: Spent 15.15 s on a formula simplification. DAG size of input: 318 DAG size of output: 315 [2020-09-04 23:24:46,038 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 220 [2020-09-04 23:24:48,004 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:48,261 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:49,727 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 228 [2020-09-04 23:24:50,838 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:24:50,952 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:07,878 WARN L193 SmtUtils]: Spent 16.85 s on a formula simplification. DAG size of input: 322 DAG size of output: 318 [2020-09-04 23:25:08,995 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:09,182 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:15,152 WARN L193 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 321 DAG size of output: 230 [2020-09-04 23:25:16,651 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 220 [2020-09-04 23:25:16,765 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:16,954 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:18,286 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 235 [2020-09-04 23:25:19,686 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 224 [2020-09-04 23:25:25,728 WARN L193 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 319 DAG size of output: 230 [2020-09-04 23:25:27,058 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 233 [2020-09-04 23:25:28,326 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:28,440 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:30,060 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 229 [2020-09-04 23:25:31,537 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 224 [2020-09-04 23:25:32,581 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:32,767 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-09-04 23:25:34,165 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 228 [2020-09-04 23:25:35,474 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:35,843 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:36,174 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:36,498 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:36,861 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:37,212 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:37,578 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:37,957 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:38,309 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:38,668 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:38,841 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-09-04 23:25:39,202 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:39,554 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:39,917 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:40,261 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:40,724 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:25:41,168 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:25:41,528 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:41,885 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:42,248 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:42,599 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:42,959 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:43,308 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:43,669 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:44,023 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:44,377 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:44,735 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:45,083 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:45,461 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:45,827 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:46,184 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:46,536 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:46,887 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:47,257 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:47,605 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:47,994 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:48,363 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:48,726 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:49,094 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:49,458 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:49,833 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:50,196 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:50,566 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:50,931 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:51,289 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:51,663 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:52,025 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:52,401 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:52,770 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:52,938 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-09-04 23:25:53,397 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:25:53,760 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:54,127 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:54,571 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:25:54,944 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:55,315 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:55,732 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:56,112 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:56,476 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:56,835 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:57,198 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:57,580 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:58,030 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:25:58,404 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:58,780 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:59,152 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:59,522 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:25:59,896 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:00,256 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:00,620 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:00,973 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:01,351 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:01,714 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:02,075 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:02,433 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:02,799 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:03,166 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:03,522 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:03,891 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:04,257 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:04,612 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:04,972 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:05,329 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:05,685 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:05,988 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:06,427 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:26:06,893 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:26:07,277 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:07,659 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:08,023 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:15,925 WARN L193 SmtUtils]: Spent 7.90 s on a formula simplification. DAG size of input: 318 DAG size of output: 228 [2020-09-04 23:26:38,325 WARN L193 SmtUtils]: Spent 22.39 s on a formula simplification. DAG size of input: 406 DAG size of output: 238 [2020-09-04 23:26:38,682 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:39,060 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:46,836 WARN L193 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 309 DAG size of output: 223 [2020-09-04 23:26:47,216 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:47,585 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:47,954 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:48,323 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:48,688 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:49,063 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:49,417 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:49,784 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:49,978 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-09-04 23:26:50,349 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:50,712 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:51,080 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:51,443 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:51,808 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:52,207 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:52,578 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:52,946 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:53,325 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:53,687 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:54,083 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:54,436 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:54,797 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:55,171 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:55,531 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:55,892 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:56,268 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:56,640 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:57,112 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:26:57,470 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:57,824 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:58,292 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:26:58,659 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:59,031 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:59,398 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:26:59,766 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:00,144 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:00,506 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:00,882 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:01,249 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:01,616 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:01,994 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:02,180 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-09-04 23:27:02,549 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:02,930 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:03,105 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-09-04 23:27:03,467 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:03,839 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:04,015 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-09-04 23:27:04,398 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:04,761 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:05,142 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:05,500 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:05,880 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:06,248 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:06,423 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-09-04 23:27:06,798 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:07,167 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:07,329 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-09-04 23:27:07,725 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:08,100 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:08,476 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:08,860 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:09,249 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:09,622 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:09,988 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:10,350 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:10,716 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:11,175 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:27:11,626 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:27:11,997 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:12,363 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:12,736 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:20,716 WARN L193 SmtUtils]: Spent 7.98 s on a formula simplification. DAG size of input: 318 DAG size of output: 228 [2020-09-04 23:27:42,467 WARN L193 SmtUtils]: Spent 21.74 s on a formula simplification. DAG size of input: 404 DAG size of output: 236 [2020-09-04 23:27:42,836 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:43,206 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:50,101 WARN L193 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 309 DAG size of output: 223 [2020-09-04 23:27:50,412 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:50,731 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:51,033 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:51,342 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:51,659 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:51,969 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:52,276 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:52,587 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:52,901 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:53,216 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:53,526 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:53,833 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:54,147 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:54,463 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:54,778 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:55,097 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:55,416 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:55,726 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:56,037 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:56,347 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:56,654 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:56,963 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:57,262 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:57,572 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:57,879 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:58,193 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:58,589 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:27:58,897 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:59,205 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:27:59,585 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:27:59,890 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:00,179 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:06,183 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 317 DAG size of output: 231 [2020-09-04 23:28:06,493 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:06,792 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:07,098 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:07,401 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:07,704 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:07,996 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:08,298 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:08,600 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:08,913 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:09,219 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:09,524 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:09,833 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:10,140 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:10,451 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:10,825 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:28:11,201 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:28:11,504 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:29,640 WARN L193 SmtUtils]: Spent 18.13 s on a formula simplification. DAG size of input: 407 DAG size of output: 236 [2020-09-04 23:28:29,920 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:30,213 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:30,492 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:30,772 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:31,059 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:31,339 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:31,620 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:31,897 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:32,173 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:32,452 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:32,737 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:33,033 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:33,318 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:33,598 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:33,974 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:28:34,255 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:34,614 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 14 [2020-09-04 23:28:34,893 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:35,168 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-09-04 23:28:35,299 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4