/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:16:39,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:16:39,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:16:39,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:16:39,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:16:39,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:16:39,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:16:39,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:16:39,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:16:39,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:16:39,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:16:39,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:16:39,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:16:39,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:16:39,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:16:39,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:16:39,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:16:39,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:16:39,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:16:39,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:16:39,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:16:39,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:16:39,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:16:39,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:16:39,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:16:39,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:16:39,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:16:39,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:16:39,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:16:39,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:16:39,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:16:39,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:16:39,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:16:39,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:16:39,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:16:39,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:16:39,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:16:39,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:16:39,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:16:39,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:16:39,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:16:39,391 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 [2020-10-26 23:16:39,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:16:39,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:16:39,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:16:39,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:16:39,433 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:16:39,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:16:39,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:16:39,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:16:39,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:16:39,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:16:39,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:16:39,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:16:39,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:16:39,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:16:39,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:16:39,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:16:39,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:16:39,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:16:39,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:16:39,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:16:39,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:16:39,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:16:39,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:16:39,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:16:39,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:16:39,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:16:39,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:16:39,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:16:39,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:16:39,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:16:39,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:16:39,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:16:39,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:16:39,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:16:39,988 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:16:39,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51.c [2020-10-26 23:16:40,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6bd9fea/60fbe73060dc421e92b1922ce06c179e/FLAG113ec6c2a [2020-10-26 23:16:41,237 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:16:41,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label51.c [2020-10-26 23:16:41,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6bd9fea/60fbe73060dc421e92b1922ce06c179e/FLAG113ec6c2a [2020-10-26 23:16:41,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa6bd9fea/60fbe73060dc421e92b1922ce06c179e [2020-10-26 23:16:41,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:16:41,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:16:41,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:16:41,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:16:41,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:16:41,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:16:41" (1/1) ... [2020-10-26 23:16:41,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c8672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:41, skipping insertion in model container [2020-10-26 23:16:41,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:16:41" (1/1) ... [2020-10-26 23:16:41,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:16:41,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:16:43,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:16:43,807 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:16:44,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:16:44,641 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:16:44,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44 WrapperNode [2020-10-26 23:16:44,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:16:44,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:16:44,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:16:44,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:16:44,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:44,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:44,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:44,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:45,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:45,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:45,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (1/1) ... [2020-10-26 23:16:45,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:16:45,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:16:45,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:16:45,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:16:45,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (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 [2020-10-26 23:16:45,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:16:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:16:45,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:16:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:16:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:16:45,265 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:16:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:16:45,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:16:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:16:45,266 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:16:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:16:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:16:45,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:16:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:16:45,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:16:45,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:16:45,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:16:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:16:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:16:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:16:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:16:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:16:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:16:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:16:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:16:58,503 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:16:58,503 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:16:58,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:16:58 BoogieIcfgContainer [2020-10-26 23:16:58,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:16:58,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:16:58,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:16:58,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:16:58,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:16:41" (1/3) ... [2020-10-26 23:16:58,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e6f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:16:58, skipping insertion in model container [2020-10-26 23:16:58,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:16:44" (2/3) ... [2020-10-26 23:16:58,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e6f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:16:58, skipping insertion in model container [2020-10-26 23:16:58,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:16:58" (3/3) ... [2020-10-26 23:16:58,528 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label51.c [2020-10-26 23:16:58,550 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:16:58,558 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:16:58,576 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:16:58,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:16:58,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:16:58,639 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:16:58,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:16:58,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:16:58,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:16:58,640 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:16:58,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:16:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:16:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 23:16:58,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:16:58,716 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] [2020-10-26 23:16:58,716 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:16:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:16:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash -707284782, now seen corresponding path program 1 times [2020-10-26 23:16:58,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:16:58,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538091127] [2020-10-26 23:16:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:16:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:59,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:59,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 23:16:59,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-26 23:16:59,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:16:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:16:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 23:16:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:16:59,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:16:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:16:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:16:59,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:16:59,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:16:59,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:16:59,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 23:16:59,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:16:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:16:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:16:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:16:59,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:16:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:16:59,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538091127] [2020-10-26 23:16:59,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:16:59,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:16:59,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190967264] [2020-10-26 23:16:59,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:16:59,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:16:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:16:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:16:59,970 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:17:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:17,588 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-26 23:17:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:17:17,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 23:17:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:17,635 INFO L225 Difference]: With dead ends: 3123 [2020-10-26 23:17:17,636 INFO L226 Difference]: Without dead ends: 1936 [2020-10-26 23:17:17,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:17:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-26 23:17:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-26 23:17:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-26 23:17:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-26 23:17:17,886 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 31 [2020-10-26 23:17:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:17,888 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-26 23:17:17,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:17:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-26 23:17:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 23:17:17,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:17,899 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:17:17,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:17:17,900 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -537988296, now seen corresponding path program 1 times [2020-10-26 23:17:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:17,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305903140] [2020-10-26 23:17:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:18,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:18,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:20,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:20,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:17:20,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:17:20,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-10-26 23:17:20,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:20,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:17:20,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 23:17:20,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 23:17:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:20,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:20,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:20,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 23:17:20,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:20,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:20,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:20,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:17:20,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:20,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-26 23:17:20,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:17:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:17:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:17:20,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305903140] [2020-10-26 23:17:20,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:17:20,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:17:20,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679940430] [2020-10-26 23:17:20,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:17:20,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:20,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:17:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:17:20,794 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 7 states. [2020-10-26 23:17:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:51,037 INFO L93 Difference]: Finished difference Result 5677 states and 8809 transitions. [2020-10-26 23:17:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:17:51,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-26 23:17:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:51,073 INFO L225 Difference]: With dead ends: 5677 [2020-10-26 23:17:51,073 INFO L226 Difference]: Without dead ends: 3765 [2020-10-26 23:17:51,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:17:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2020-10-26 23:17:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 3651. [2020-10-26 23:17:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2020-10-26 23:17:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 5413 transitions. [2020-10-26 23:17:51,248 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 5413 transitions. Word has length 107 [2020-10-26 23:17:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:51,249 INFO L481 AbstractCegarLoop]: Abstraction has 3651 states and 5413 transitions. [2020-10-26 23:17:51,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:17:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 5413 transitions. [2020-10-26 23:17:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 23:17:51,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:51,263 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:17:51,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:17:51,264 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1785288923, now seen corresponding path program 1 times [2020-10-26 23:17:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733032835] [2020-10-26 23:17:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:51,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:51,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:52,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:52,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 23:17:52,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:17:52,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-26 23:17:52,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:17:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:17:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:52,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:52,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:52,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 23:17:52,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:52,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:52,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:17:53,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:53,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 23:17:53,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:53,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:17:53,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:17:53,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733032835] [2020-10-26 23:17:53,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:17:53,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:17:53,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109529705] [2020-10-26 23:17:53,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:17:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:17:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:17:53,284 INFO L87 Difference]: Start difference. First operand 3651 states and 5413 transitions. Second operand 8 states. [2020-10-26 23:18:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:28,478 INFO L93 Difference]: Finished difference Result 14207 states and 21786 transitions. [2020-10-26 23:18:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 23:18:28,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-10-26 23:18:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:28,547 INFO L225 Difference]: With dead ends: 14207 [2020-10-26 23:18:28,548 INFO L226 Difference]: Without dead ends: 10562 [2020-10-26 23:18:28,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:18:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2020-10-26 23:18:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10496. [2020-10-26 23:18:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10496 states. [2020-10-26 23:18:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 14478 transitions. [2020-10-26 23:18:28,951 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 14478 transitions. Word has length 121 [2020-10-26 23:18:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:28,952 INFO L481 AbstractCegarLoop]: Abstraction has 10496 states and 14478 transitions. [2020-10-26 23:18:28,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:18:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 14478 transitions. [2020-10-26 23:18:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 23:18:28,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:28,958 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:18:28,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:18:28,963 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash -439269793, now seen corresponding path program 1 times [2020-10-26 23:18:28,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:28,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468613061] [2020-10-26 23:18:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:29,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:30,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:30,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-26 23:18:30,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:18:30,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-26 23:18:30,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:18:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 23:18:30,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:30,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:30,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:30,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:30,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:31,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:31,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-26 23:18:31,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:18:31,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468613061] [2020-10-26 23:18:31,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:18:31,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:18:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123200774] [2020-10-26 23:18:31,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:18:31,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:31,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:18:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:18:31,299 INFO L87 Difference]: Start difference. First operand 10496 states and 14478 transitions. Second operand 7 states. [2020-10-26 23:19:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:00,012 INFO L93 Difference]: Finished difference Result 31611 states and 45990 transitions. [2020-10-26 23:19:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:19:00,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-26 23:19:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:00,128 INFO L225 Difference]: With dead ends: 31611 [2020-10-26 23:19:00,128 INFO L226 Difference]: Without dead ends: 21121 [2020-10-26 23:19:00,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:19:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21121 states. [2020-10-26 23:19:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21121 to 20989. [2020-10-26 23:19:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20989 states. [2020-10-26 23:19:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20989 states to 20989 states and 28067 transitions. [2020-10-26 23:19:00,892 INFO L78 Accepts]: Start accepts. Automaton has 20989 states and 28067 transitions. Word has length 149 [2020-10-26 23:19:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:00,893 INFO L481 AbstractCegarLoop]: Abstraction has 20989 states and 28067 transitions. [2020-10-26 23:19:00,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:19:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20989 states and 28067 transitions. [2020-10-26 23:19:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 23:19:00,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:00,898 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-26 23:19:00,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:19:00,899 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1953469998, now seen corresponding path program 1 times [2020-10-26 23:19:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:00,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663823398] [2020-10-26 23:19:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:01,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:02,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:05,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:05,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 23:19:05,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:19:05,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 23:19:05,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:19:05,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:05,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-26 23:19:05,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:06,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:06,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:06,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:06,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:06,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:06,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:06,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:19:06,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:06,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 23:19:06,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:06,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:19:06,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:06,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:19:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:06,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:06,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:06,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:19:06,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:06,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 23:19:06,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:06,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:19:06,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:19:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663823398] [2020-10-26 23:19:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:19:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:19:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333633187] [2020-10-26 23:19:06,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:19:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:06,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:19:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:19:06,815 INFO L87 Difference]: Start difference. First operand 20989 states and 28067 transitions. Second operand 8 states. [2020-10-26 23:19:06,966 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:19:11,125 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:19:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:49,278 INFO L93 Difference]: Finished difference Result 62389 states and 91246 transitions. [2020-10-26 23:19:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:19:49,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 199 [2020-10-26 23:19:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:49,490 INFO L225 Difference]: With dead ends: 62389 [2020-10-26 23:19:49,491 INFO L226 Difference]: Without dead ends: 41406 [2020-10-26 23:19:49,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:19:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41406 states. [2020-10-26 23:19:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41406 to 38456. [2020-10-26 23:19:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38456 states. [2020-10-26 23:19:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38456 states to 38456 states and 51020 transitions. [2020-10-26 23:19:50,951 INFO L78 Accepts]: Start accepts. Automaton has 38456 states and 51020 transitions. Word has length 199 [2020-10-26 23:19:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:50,952 INFO L481 AbstractCegarLoop]: Abstraction has 38456 states and 51020 transitions. [2020-10-26 23:19:50,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:19:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 38456 states and 51020 transitions. [2020-10-26 23:19:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 23:19:50,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:50,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 23:19:50,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:19:50,959 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1119193746, now seen corresponding path program 1 times [2020-10-26 23:19:50,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:50,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990231771] [2020-10-26 23:19:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:51,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:56,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:56,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 23:19:56,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:19:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 23:19:56,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:19:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:19:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:56,251 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:19:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:56,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:56,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:56,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:56,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:56,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:19:56,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:56,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:56,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:56,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:56,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:56,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:56,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:56,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:19:56,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:56,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:19:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:56,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:56,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:19:56,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:19:56,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:19:56,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990231771] [2020-10-26 23:19:56,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:19:56,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:19:56,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206249150] [2020-10-26 23:19:56,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:19:56,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:19:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:19:56,989 INFO L87 Difference]: Start difference. First operand 38456 states and 51020 transitions. Second operand 7 states. [2020-10-26 23:19:57,148 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:19:59,463 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:20:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:21,754 INFO L93 Difference]: Finished difference Result 78184 states and 104232 transitions. [2020-10-26 23:20:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:20:21,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 231 [2020-10-26 23:20:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:21,944 INFO L225 Difference]: With dead ends: 78184 [2020-10-26 23:20:21,944 INFO L226 Difference]: Without dead ends: 39734 [2020-10-26 23:20:22,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:20:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39734 states. [2020-10-26 23:20:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39734 to 39435. [2020-10-26 23:20:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39435 states. [2020-10-26 23:20:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39435 states to 39435 states and 52275 transitions. [2020-10-26 23:20:23,606 INFO L78 Accepts]: Start accepts. Automaton has 39435 states and 52275 transitions. Word has length 231 [2020-10-26 23:20:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:23,606 INFO L481 AbstractCegarLoop]: Abstraction has 39435 states and 52275 transitions. [2020-10-26 23:20:23,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:20:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 39435 states and 52275 transitions. [2020-10-26 23:20:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 23:20:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:23,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 23:20:23,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:20:23,612 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1372582859, now seen corresponding path program 1 times [2020-10-26 23:20:23,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:23,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237626645] [2020-10-26 23:20:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:24,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 23:20:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-26 23:20:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:20:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:20:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:20:25,333 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:20:25,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:25,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:25,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:25,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:25,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:25,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:20:25,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:25,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:20:25,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:25,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:20:25,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:25,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:25,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:25,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:20:25,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:25,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 23:20:25,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:25,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:20:25,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:20:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:25,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:25,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:20:25,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:25,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-26 23:20:25,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:20:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:20:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237626645] [2020-10-26 23:20:25,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:20:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:20:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879336496] [2020-10-26 23:20:25,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:20:25,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:20:26,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:20:26,001 INFO L87 Difference]: Start difference. First operand 39435 states and 52275 transitions. Second operand 7 states. [2020-10-26 23:20:26,195 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66