/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec3_product53.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:08:33,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:08:33,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:08:33,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:08:33,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:08:33,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:08:33,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:08:33,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:08:33,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:08:33,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:08:33,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:08:33,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:08:33,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:08:33,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:08:33,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:08:33,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:08:33,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:08:33,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:08:33,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:08:33,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:08:33,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:08:33,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:08:33,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:08:33,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:08:33,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:08:33,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:08:33,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:08:33,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:08:33,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:08:33,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:08:33,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:08:33,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:08:33,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:08:33,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:08:33,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:08:33,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:08:33,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:08:33,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:08:33,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:08:33,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:08:33,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:08:33,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 20:08:33,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:08:33,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:08:33,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:08:33,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:08:33,279 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:08:33,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:08:33,280 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:08:33,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:08:33,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:08:33,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:08:33,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:08:33,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:08:33,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:08:33,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:08:33,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:08:33,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:08:33,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:08:33,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:08:33,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:08:33,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:08:33,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:08:33,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:08:33,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:08:33,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:08:33,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:08:33,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:08:33,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:08:33,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:08:33,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:08:33,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:08:33,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:08:33,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:08:33,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:08:33,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:08:33,646 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:08:33,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec3_product53.cil.c [2020-08-18 20:08:33,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94996c896/1893ca2ef9094066ac7ed16b9ba432a0/FLAG394d95b39 [2020-08-18 20:08:34,202 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:08:34,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec3_product53.cil.c [2020-08-18 20:08:34,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94996c896/1893ca2ef9094066ac7ed16b9ba432a0/FLAG394d95b39 [2020-08-18 20:08:34,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94996c896/1893ca2ef9094066ac7ed16b9ba432a0 [2020-08-18 20:08:34,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:08:34,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:08:34,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:08:34,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:08:34,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:08:34,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:08:34" (1/1) ... [2020-08-18 20:08:34,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6851a90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:34, skipping insertion in model container [2020-08-18 20:08:34,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:08:34" (1/1) ... [2020-08-18 20:08:34,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:08:34,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:08:35,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:08:35,109 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:08:35,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:08:35,231 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:08:35,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35 WrapperNode [2020-08-18 20:08:35,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:08:35,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:08:35,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:08:35,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:08:35,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... [2020-08-18 20:08:35,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:08:35,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:08:35,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:08:35,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:08:35,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:08:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:08:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:08:35,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-08-18 20:08:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-08-18 20:08:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-08-18 20:08:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-08-18 20:08:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-08-18 20:08:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-08-18 20:08:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-08-18 20:08:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-08-18 20:08:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-08-18 20:08:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:08:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 20:08:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-08-18 20:08:35,387 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-08-18 20:08:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-08-18 20:08:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-08-18 20:08:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-08-18 20:08:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-08-18 20:08:35,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-08-18 20:08:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2020-08-18 20:08:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-08-18 20:08:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2020-08-18 20:08:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-08-18 20:08:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-08-18 20:08:35,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:08:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-08-18 20:08:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-08-18 20:08:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-08-18 20:08:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-08-18 20:08:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-08-18 20:08:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-08-18 20:08:35,394 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-08-18 20:08:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2020-08-18 20:08:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-08-18 20:08:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-08-18 20:08:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-08-18 20:08:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2020-08-18 20:08:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-08-18 20:08:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-08-18 20:08:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-08-18 20:08:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:08:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-08-18 20:08:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-08-18 20:08:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:08:35,399 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:08:35,399 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-08-18 20:08:35,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:08:35,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:08:35,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:08:35,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:08:35,401 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-08-18 20:08:35,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-08-18 20:08:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:08:35,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:08:36,363 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:08:36,364 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 20:08:36,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:08:36 BoogieIcfgContainer [2020-08-18 20:08:36,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:08:36,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:08:36,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:08:36,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:08:36,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:08:34" (1/3) ... [2020-08-18 20:08:36,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5ace18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:08:36, skipping insertion in model container [2020-08-18 20:08:36,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:08:35" (2/3) ... [2020-08-18 20:08:36,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5ace18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:08:36, skipping insertion in model container [2020-08-18 20:08:36,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:08:36" (3/3) ... [2020-08-18 20:08:36,377 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product53.cil.c [2020-08-18 20:08:36,386 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:08:36,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:08:36,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:08:36,429 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:08:36,429 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:08:36,429 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:08:36,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:08:36,430 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:08:36,430 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:08:36,430 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:08:36,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:08:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-08-18 20:08:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 20:08:36,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:36,465 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] [2020-08-18 20:08:36,465 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1930033303, now seen corresponding path program 1 times [2020-08-18 20:08:36,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:36,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293585536] [2020-08-18 20:08:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,079 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:37,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:08:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 20:08:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 20:08:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:37,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293585536] [2020-08-18 20:08:37,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:37,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:08:37,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350496674] [2020-08-18 20:08:37,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:08:37,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:08:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:08:37,208 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 3 states. [2020-08-18 20:08:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:38,392 INFO L93 Difference]: Finished difference Result 341 states and 445 transitions. [2020-08-18 20:08:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:08:38,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 20:08:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:38,409 INFO L225 Difference]: With dead ends: 341 [2020-08-18 20:08:38,409 INFO L226 Difference]: Without dead ends: 183 [2020-08-18 20:08:38,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:08:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-08-18 20:08:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2020-08-18 20:08:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 20:08:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2020-08-18 20:08:38,525 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 52 [2020-08-18 20:08:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:38,526 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2020-08-18 20:08:38,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:08:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2020-08-18 20:08:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 20:08:38,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:38,532 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] [2020-08-18 20:08:38,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:08:38,533 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1692135718, now seen corresponding path program 1 times [2020-08-18 20:08:38,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:38,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024085274] [2020-08-18 20:08:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,920 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:38,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 20:08:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:08:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 20:08:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:38,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024085274] [2020-08-18 20:08:38,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:38,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 20:08:38,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714332837] [2020-08-18 20:08:38,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 20:08:38,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:38,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 20:08:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 20:08:38,978 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 4 states. [2020-08-18 20:08:39,387 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:08:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:40,319 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2020-08-18 20:08:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 20:08:40,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-08-18 20:08:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:40,323 INFO L225 Difference]: With dead ends: 274 [2020-08-18 20:08:40,323 INFO L226 Difference]: Without dead ends: 167 [2020-08-18 20:08:40,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:08:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-08-18 20:08:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2020-08-18 20:08:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 20:08:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-08-18 20:08:40,397 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 53 [2020-08-18 20:08:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:40,398 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-08-18 20:08:40,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 20:08:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-08-18 20:08:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 20:08:40,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:40,406 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] [2020-08-18 20:08:40,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:08:40,408 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1292389066, now seen corresponding path program 1 times [2020-08-18 20:08:40,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:40,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383973438] [2020-08-18 20:08:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,737 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:40,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 20:08:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 20:08:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 20:08:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:40,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383973438] [2020-08-18 20:08:40,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:40,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:08:40,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541980496] [2020-08-18 20:08:40,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:08:40,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:08:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:08:40,864 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand 8 states. [2020-08-18 20:08:41,199 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:41,528 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:41,770 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:41,987 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:43,239 INFO L93 Difference]: Finished difference Result 283 states and 350 transitions. [2020-08-18 20:08:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:08:43,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-08-18 20:08:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:43,243 INFO L225 Difference]: With dead ends: 283 [2020-08-18 20:08:43,243 INFO L226 Difference]: Without dead ends: 167 [2020-08-18 20:08:43,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:08:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-08-18 20:08:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2020-08-18 20:08:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 20:08:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2020-08-18 20:08:43,280 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 57 [2020-08-18 20:08:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:43,281 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2020-08-18 20:08:43,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:08:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2020-08-18 20:08:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 20:08:43,283 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:43,284 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] [2020-08-18 20:08:43,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:08:43,284 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 875217030, now seen corresponding path program 1 times [2020-08-18 20:08:43,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:43,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947829661] [2020-08-18 20:08:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,596 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:08:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 20:08:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 20:08:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 20:08:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:43,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947829661] [2020-08-18 20:08:43,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:43,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:08:43,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465017843] [2020-08-18 20:08:43,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:08:43,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:08:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:08:43,780 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand 6 states. [2020-08-18 20:08:44,086 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:45,233 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:08:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:45,935 INFO L93 Difference]: Finished difference Result 393 states and 487 transitions. [2020-08-18 20:08:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:08:45,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-08-18 20:08:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:45,940 INFO L225 Difference]: With dead ends: 393 [2020-08-18 20:08:45,940 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 20:08:45,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:08:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 20:08:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 236. [2020-08-18 20:08:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 20:08:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2020-08-18 20:08:45,993 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 75 [2020-08-18 20:08:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:45,994 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2020-08-18 20:08:45,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:08:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2020-08-18 20:08:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 20:08:45,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:45,996 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] [2020-08-18 20:08:45,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:08:45,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1332654256, now seen corresponding path program 1 times [2020-08-18 20:08:45,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:45,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358358578] [2020-08-18 20:08:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,300 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:46,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:08:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:08:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:08:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 20:08:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 20:08:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 20:08:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:46,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358358578] [2020-08-18 20:08:46,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:46,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:08:46,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8223446] [2020-08-18 20:08:46,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:08:46,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:08:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:08:46,410 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand 8 states. [2020-08-18 20:08:46,769 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:48,010 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:48,300 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:48,546 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:48,767 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:49,650 INFO L93 Difference]: Finished difference Result 614 states and 761 transitions. [2020-08-18 20:08:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 20:08:49,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-08-18 20:08:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:49,654 INFO L225 Difference]: With dead ends: 614 [2020-08-18 20:08:49,654 INFO L226 Difference]: Without dead ends: 402 [2020-08-18 20:08:49,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:08:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-18 20:08:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 362. [2020-08-18 20:08:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-18 20:08:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 420 transitions. [2020-08-18 20:08:49,725 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 420 transitions. Word has length 89 [2020-08-18 20:08:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:49,726 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 420 transitions. [2020-08-18 20:08:49,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:08:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 420 transitions. [2020-08-18 20:08:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 20:08:49,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:49,728 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] [2020-08-18 20:08:49,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:08:49,729 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash -920967306, now seen corresponding path program 1 times [2020-08-18 20:08:49,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:49,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376254581] [2020-08-18 20:08:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,008 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:50,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:08:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:08:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:08:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:08:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 20:08:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 20:08:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 20:08:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:50,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376254581] [2020-08-18 20:08:50,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:50,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 20:08:50,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952461292] [2020-08-18 20:08:50,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 20:08:50,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 20:08:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:08:50,204 INFO L87 Difference]: Start difference. First operand 362 states and 420 transitions. Second operand 9 states. [2020-08-18 20:08:50,592 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:51,099 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:52,507 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:08:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:54,499 INFO L93 Difference]: Finished difference Result 935 states and 1195 transitions. [2020-08-18 20:08:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 20:08:54,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-08-18 20:08:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:54,508 INFO L225 Difference]: With dead ends: 935 [2020-08-18 20:08:54,508 INFO L226 Difference]: Without dead ends: 712 [2020-08-18 20:08:54,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-08-18 20:08:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-08-18 20:08:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 646. [2020-08-18 20:08:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-08-18 20:08:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 781 transitions. [2020-08-18 20:08:54,631 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 781 transitions. Word has length 93 [2020-08-18 20:08:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:54,632 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 781 transitions. [2020-08-18 20:08:54,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 20:08:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 781 transitions. [2020-08-18 20:08:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 20:08:54,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:54,634 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] [2020-08-18 20:08:54,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:08:54,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:54,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:54,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1438339703, now seen corresponding path program 1 times [2020-08-18 20:08:54,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:54,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385935043] [2020-08-18 20:08:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,855 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:08:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:08:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:08:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:08:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 20:08:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 20:08:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 20:08:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:54,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385935043] [2020-08-18 20:08:54,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:54,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 20:08:54,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581864090] [2020-08-18 20:08:54,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:08:54,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:08:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:08:54,995 INFO L87 Difference]: Start difference. First operand 646 states and 781 transitions. Second operand 8 states. [2020-08-18 20:08:55,724 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:55,946 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:56,202 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:08:57,329 INFO L93 Difference]: Finished difference Result 1191 states and 1490 transitions. [2020-08-18 20:08:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 20:08:57,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-08-18 20:08:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:08:57,336 INFO L225 Difference]: With dead ends: 1191 [2020-08-18 20:08:57,336 INFO L226 Difference]: Without dead ends: 688 [2020-08-18 20:08:57,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:08:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2020-08-18 20:08:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 646. [2020-08-18 20:08:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-08-18 20:08:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 780 transitions. [2020-08-18 20:08:57,468 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 780 transitions. Word has length 93 [2020-08-18 20:08:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:08:57,469 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 780 transitions. [2020-08-18 20:08:57,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 20:08:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 780 transitions. [2020-08-18 20:08:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 20:08:57,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:08:57,471 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] [2020-08-18 20:08:57,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:08:57,472 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:08:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:08:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2097871225, now seen corresponding path program 1 times [2020-08-18 20:08:57,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:08:57,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402065406] [2020-08-18 20:08:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:08:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,742 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:08:57,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:08:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:08:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:08:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:08:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:08:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:08:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:08:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:08:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:08:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:08:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 20:08:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 20:08:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 20:08:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:08:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:08:57,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402065406] [2020-08-18 20:08:57,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:08:57,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 20:08:57,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642774328] [2020-08-18 20:08:57,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 20:08:57,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:08:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 20:08:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:08:57,896 INFO L87 Difference]: Start difference. First operand 646 states and 780 transitions. Second operand 12 states. [2020-08-18 20:08:58,377 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:08:58,604 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:08:58,828 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:08:59,478 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:08:59,705 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:08:59,979 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:00,201 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:01,476 INFO L93 Difference]: Finished difference Result 1270 states and 1579 transitions. [2020-08-18 20:09:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 20:09:01,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-08-18 20:09:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:01,481 INFO L225 Difference]: With dead ends: 1270 [2020-08-18 20:09:01,482 INFO L226 Difference]: Without dead ends: 648 [2020-08-18 20:09:01,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-18 20:09:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-08-18 20:09:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 617. [2020-08-18 20:09:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 20:09:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 740 transitions. [2020-08-18 20:09:01,590 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 740 transitions. Word has length 93 [2020-08-18 20:09:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:01,591 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 740 transitions. [2020-08-18 20:09:01,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 20:09:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 740 transitions. [2020-08-18 20:09:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 20:09:01,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:01,592 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] [2020-08-18 20:09:01,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:09:01,593 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 791892564, now seen corresponding path program 1 times [2020-08-18 20:09:01,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:01,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160544391] [2020-08-18 20:09:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,907 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:01,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:09:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:09:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 20:09:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 20:09:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 20:09:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:09:02,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160544391] [2020-08-18 20:09:02,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:09:02,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-18 20:09:02,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494726264] [2020-08-18 20:09:02,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 20:09:02,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 20:09:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-18 20:09:02,046 INFO L87 Difference]: Start difference. First operand 617 states and 740 transitions. Second operand 13 states. [2020-08-18 20:09:02,773 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:03,116 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:03,352 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:04,224 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:04,808 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:05,091 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:09:05,346 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:09:05,971 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:06,275 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:06,692 INFO L93 Difference]: Finished difference Result 1241 states and 1503 transitions. [2020-08-18 20:09:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 20:09:06,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2020-08-18 20:09:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:06,698 INFO L225 Difference]: With dead ends: 1241 [2020-08-18 20:09:06,698 INFO L226 Difference]: Without dead ends: 648 [2020-08-18 20:09:06,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2020-08-18 20:09:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2020-08-18 20:09:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 617. [2020-08-18 20:09:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 20:09:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 724 transitions. [2020-08-18 20:09:06,780 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 724 transitions. Word has length 94 [2020-08-18 20:09:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:06,781 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 724 transitions. [2020-08-18 20:09:06,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 20:09:06,781 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 724 transitions. [2020-08-18 20:09:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 20:09:06,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:06,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:06,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:09:06,784 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash -361137762, now seen corresponding path program 1 times [2020-08-18 20:09:06,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:06,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420495193] [2020-08-18 20:09:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,071 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:09:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 20:09:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 20:09:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 20:09:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 20:09:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 20:09:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 20:09:07,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420495193] [2020-08-18 20:09:07,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:07,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:09:07,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123657726] [2020-08-18 20:09:07,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:09:07,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:09:07,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:09:07,305 INFO L87 Difference]: Start difference. First operand 617 states and 724 transitions. Second operand 10 states. [2020-08-18 20:09:08,197 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:08,416 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:08,652 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:08,888 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:09,815 INFO L93 Difference]: Finished difference Result 1154 states and 1382 transitions. [2020-08-18 20:09:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:09:09,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 137 [2020-08-18 20:09:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:09,826 INFO L225 Difference]: With dead ends: 1154 [2020-08-18 20:09:09,826 INFO L226 Difference]: Without dead ends: 636 [2020-08-18 20:09:09,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-08-18 20:09:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-08-18 20:09:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 617. [2020-08-18 20:09:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 20:09:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 722 transitions. [2020-08-18 20:09:09,940 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 722 transitions. Word has length 137 [2020-08-18 20:09:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:09,940 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 722 transitions. [2020-08-18 20:09:09,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 20:09:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 722 transitions. [2020-08-18 20:09:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-18 20:09:09,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:09,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:09,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:09:09,943 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1515345056, now seen corresponding path program 1 times [2020-08-18 20:09:09,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:09,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037378407] [2020-08-18 20:09:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,244 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 20:09:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 20:09:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 20:09:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 20:09:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 20:09:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 20:09:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 20:09:10,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037378407] [2020-08-18 20:09:10,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:10,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 20:09:10,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146343187] [2020-08-18 20:09:10,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 20:09:10,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 20:09:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-08-18 20:09:10,528 INFO L87 Difference]: Start difference. First operand 617 states and 722 transitions. Second operand 12 states. [2020-08-18 20:09:11,311 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:11,695 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:11,950 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:12,506 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:12,735 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:12,951 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:14,015 INFO L93 Difference]: Finished difference Result 1066 states and 1276 transitions. [2020-08-18 20:09:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 20:09:14,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 137 [2020-08-18 20:09:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:14,019 INFO L225 Difference]: With dead ends: 1066 [2020-08-18 20:09:14,020 INFO L226 Difference]: Without dead ends: 543 [2020-08-18 20:09:14,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-08-18 20:09:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-08-18 20:09:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 524. [2020-08-18 20:09:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-08-18 20:09:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 611 transitions. [2020-08-18 20:09:14,131 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 611 transitions. Word has length 137 [2020-08-18 20:09:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:14,131 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 611 transitions. [2020-08-18 20:09:14,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 20:09:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 611 transitions. [2020-08-18 20:09:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-18 20:09:14,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:14,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:14,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:09:14,136 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash -834613817, now seen corresponding path program 1 times [2020-08-18 20:09:14,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:14,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016771494] [2020-08-18 20:09:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,406 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:14,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:09:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 20:09:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 20:09:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 20:09:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 20:09:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 20:09:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 20:09:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-18 20:09:14,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016771494] [2020-08-18 20:09:14,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:14,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 20:09:14,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085169886] [2020-08-18 20:09:14,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:09:14,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:09:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:09:14,566 INFO L87 Difference]: Start difference. First operand 524 states and 611 transitions. Second operand 11 states. [2020-08-18 20:09:14,992 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:15,547 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:16,383 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:16,878 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2020-08-18 20:09:17,318 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2020-08-18 20:09:17,535 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:19,030 INFO L93 Difference]: Finished difference Result 1550 states and 1871 transitions. [2020-08-18 20:09:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 20:09:19,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-08-18 20:09:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:19,036 INFO L225 Difference]: With dead ends: 1550 [2020-08-18 20:09:19,036 INFO L226 Difference]: Without dead ends: 1050 [2020-08-18 20:09:19,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2020-08-18 20:09:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-08-18 20:09:19,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1021. [2020-08-18 20:09:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1021 states. [2020-08-18 20:09:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1176 transitions. [2020-08-18 20:09:19,215 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1176 transitions. Word has length 141 [2020-08-18 20:09:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:19,218 INFO L479 AbstractCegarLoop]: Abstraction has 1021 states and 1176 transitions. [2020-08-18 20:09:19,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:09:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1176 transitions. [2020-08-18 20:09:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-18 20:09:19,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:19,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:19,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:09:19,221 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:19,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1626419797, now seen corresponding path program 1 times [2020-08-18 20:09:19,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:19,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559411740] [2020-08-18 20:09:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,526 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:19,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:09:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 20:09:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 20:09:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 20:09:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-18 20:09:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 20:09:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 20:09:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 20:09:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 20:09:19,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559411740] [2020-08-18 20:09:19,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:19,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 20:09:19,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428455038] [2020-08-18 20:09:19,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 20:09:19,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 20:09:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:09:19,743 INFO L87 Difference]: Start difference. First operand 1021 states and 1176 transitions. Second operand 15 states. [2020-08-18 20:09:20,377 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:20,608 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:20,826 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:21,361 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:22,317 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:22,633 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:22,898 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:09:23,132 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:09:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:24,918 INFO L93 Difference]: Finished difference Result 2052 states and 2452 transitions. [2020-08-18 20:09:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 20:09:24,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 145 [2020-08-18 20:09:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:24,924 INFO L225 Difference]: With dead ends: 2052 [2020-08-18 20:09:24,925 INFO L226 Difference]: Without dead ends: 1055 [2020-08-18 20:09:24,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-18 20:09:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-08-18 20:09:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 955. [2020-08-18 20:09:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-08-18 20:09:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1097 transitions. [2020-08-18 20:09:25,117 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1097 transitions. Word has length 145 [2020-08-18 20:09:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:25,117 INFO L479 AbstractCegarLoop]: Abstraction has 955 states and 1097 transitions. [2020-08-18 20:09:25,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 20:09:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1097 transitions. [2020-08-18 20:09:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 20:09:25,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:25,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:25,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:09:25,123 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -248365737, now seen corresponding path program 1 times [2020-08-18 20:09:25,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:25,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565528618] [2020-08-18 20:09:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,410 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:09:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 20:09:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 20:09:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 20:09:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 20:09:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 20:09:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 20:09:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 20:09:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-18 20:09:25,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565528618] [2020-08-18 20:09:25,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:25,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 20:09:25,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018726746] [2020-08-18 20:09:25,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 20:09:25,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 20:09:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-18 20:09:25,641 INFO L87 Difference]: Start difference. First operand 955 states and 1097 transitions. Second operand 15 states. [2020-08-18 20:09:26,198 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-08-18 20:09:26,846 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:09:27,853 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:28,176 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:28,653 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 20:09:29,118 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-08-18 20:09:30,035 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:30,266 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:30,514 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:30,754 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:30,982 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:31,218 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:09:31,469 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:31,717 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-08-18 20:09:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:09:32,464 INFO L93 Difference]: Finished difference Result 1667 states and 1963 transitions. [2020-08-18 20:09:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 20:09:32,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2020-08-18 20:09:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:09:32,469 INFO L225 Difference]: With dead ends: 1667 [2020-08-18 20:09:32,469 INFO L226 Difference]: Without dead ends: 870 [2020-08-18 20:09:32,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 20:09:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2020-08-18 20:09:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 844. [2020-08-18 20:09:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-08-18 20:09:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 961 transitions. [2020-08-18 20:09:32,636 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 961 transitions. Word has length 147 [2020-08-18 20:09:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:09:32,636 INFO L479 AbstractCegarLoop]: Abstraction has 844 states and 961 transitions. [2020-08-18 20:09:32,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 20:09:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 961 transitions. [2020-08-18 20:09:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-08-18 20:09:32,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:09:32,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 20:09:32,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:09:32,643 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:09:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:09:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash 650257106, now seen corresponding path program 1 times [2020-08-18 20:09:32,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:09:32,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081812476] [2020-08-18 20:09:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:09:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,900 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-08-18 20:09:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:09:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:09:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 20:09:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:09:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:09:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:09:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 20:09:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:09:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 20:09:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 20:09:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 20:09:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 20:09:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 20:09:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:09:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:09:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 20:09:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 20:09:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 20:09:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 20:09:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:09:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 20:09:33,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081812476] [2020-08-18 20:09:33,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:09:33,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 20:09:33,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670440559] [2020-08-18 20:09:33,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 20:09:33,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:09:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 20:09:33,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:09:33,074 INFO L87 Difference]: Start difference. First operand 844 states and 961 transitions. Second operand 10 states.