/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/array-fpi/brs3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:36:57,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:36:57,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:36:57,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:36:57,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:36:57,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:36:57,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:36:57,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:36:57,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:36:57,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:36:57,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:36:57,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:36:57,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:36:57,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:36:57,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:36:57,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:36:57,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:36:57,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:36:57,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:36:57,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:36:57,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:36:57,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:36:57,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:36:57,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:36:57,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:36:57,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:36:57,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:36:57,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:36:57,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:36:57,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:36:57,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:36:57,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:36:57,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:36:57,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:36:57,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:36:57,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:36:57,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:36:57,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:36:57,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:36:57,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:36:57,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:36:57,379 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 19:36:57,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:36:57,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:36:57,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:36:57,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:36:57,410 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:36:57,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:36:57,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:36:57,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:36:57,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:36:57,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:36:57,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:36:57,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:36:57,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:36:57,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:36:57,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:36:57,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:36:57,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:36:57,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:36:57,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:36:57,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:36:57,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:36:57,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:36:57,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:36:57,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:36:57,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:36:57,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:36:57,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:36:57,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:36:57,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:36:57,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:36:57,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:36:57,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:36:57,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:36:57,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:36:57,867 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:36:57,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3.c [2020-10-26 19:36:57,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f886bac49/d3e26276fa1744c3b2785345372f2f69/FLAGce5f990b9 [2020-10-26 19:36:58,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:36:58,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3.c [2020-10-26 19:36:58,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f886bac49/d3e26276fa1744c3b2785345372f2f69/FLAGce5f990b9 [2020-10-26 19:36:58,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f886bac49/d3e26276fa1744c3b2785345372f2f69 [2020-10-26 19:36:58,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:36:58,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:36:58,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:36:58,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:36:58,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:36:58,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:36:58" (1/1) ... [2020-10-26 19:36:58,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca2628f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:58, skipping insertion in model container [2020-10-26 19:36:58,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:36:58" (1/1) ... [2020-10-26 19:36:59,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:36:59,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:36:59,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:36:59,195 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:36:59,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:36:59,237 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:36:59,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59 WrapperNode [2020-10-26 19:36:59,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:36:59,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:36:59,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:36:59,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:36:59,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (1/1) ... [2020-10-26 19:36:59,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:36:59,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:36:59,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:36:59,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:36:59,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (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 19:36:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:36:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:36:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:36:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:36:59,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:36:59,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:36:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:36:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:36:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:36:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:36:59,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:36:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:36:59,827 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:36:59,828 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:36:59,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:36:59 BoogieIcfgContainer [2020-10-26 19:36:59,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:36:59,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:36:59,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:36:59,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:36:59,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:36:58" (1/3) ... [2020-10-26 19:36:59,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621beb9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:36:59, skipping insertion in model container [2020-10-26 19:36:59,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:36:59" (2/3) ... [2020-10-26 19:36:59,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621beb9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:36:59, skipping insertion in model container [2020-10-26 19:36:59,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:36:59" (3/3) ... [2020-10-26 19:36:59,888 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3.c [2020-10-26 19:36:59,918 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:36:59,943 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:36:59,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:37:00,001 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:37:00,002 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:37:00,002 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:37:00,002 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:37:00,002 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:37:00,002 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:37:00,002 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:37:00,003 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:37:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:37:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:00,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:00,033 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] [2020-10-26 19:37:00,034 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 288317380, now seen corresponding path program 1 times [2020-10-26 19:37:00,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:00,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138301217] [2020-10-26 19:37:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:00,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:00,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:00,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:00,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:00,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:00,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-26 19:37:00,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-26 19:37:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:00,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:37:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:00,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:00,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:00,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:00,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:37:00,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:00,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:00,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:00,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:00,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:00,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:00,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:00,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:00,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:00,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:37:00,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:00,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:00,766 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 19:37:00,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138301217] [2020-10-26 19:37:00,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:00,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:37:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495097257] [2020-10-26 19:37:00,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:37:00,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:37:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:00,798 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-26 19:37:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:00,930 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-26 19:37:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:37:00,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-26 19:37:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:00,941 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:37:00,942 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:37:00,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:37:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:37:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 19:37:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:37:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:37:00,995 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-26 19:37:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:00,996 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:37:00,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:37:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:37:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:37:00,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:00,997 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] [2020-10-26 19:37:00,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:37:00,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1231035376, now seen corresponding path program 1 times [2020-10-26 19:37:01,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:01,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949342772] [2020-10-26 19:37:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:37:01,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:01,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-26 19:37:01,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:37:01,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:01,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:37:01,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:01,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:01,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:01,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:01,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:01,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:01,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:01,534 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 19:37:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949342772] [2020-10-26 19:37:01,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:01,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:37:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723734439] [2020-10-26 19:37:01,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:37:01,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:37:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:37:01,539 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-26 19:37:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:01,720 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-26 19:37:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:37:01,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:37:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:01,722 INFO L225 Difference]: With dead ends: 40 [2020-10-26 19:37:01,722 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:37:01,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:37:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:37:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 19:37:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:37:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-26 19:37:01,733 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2020-10-26 19:37:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:01,734 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-26 19:37:01,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:37:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-26 19:37:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:01,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:01,736 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] [2020-10-26 19:37:01,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:37:01,736 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1214934215, now seen corresponding path program 1 times [2020-10-26 19:37:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:01,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89218216] [2020-10-26 19:37:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-26 19:37:02,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:37:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:37:02,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:02,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:02,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:02,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:02,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:37:02,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:02,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:02,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:02,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:02,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89218216] [2020-10-26 19:37:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:02,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:37:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573303588] [2020-10-26 19:37:02,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:37:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:37:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:37:02,894 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-26 19:37:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:03,262 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-26 19:37:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:37:03,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-26 19:37:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:03,264 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:37:03,264 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:37:03,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:37:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:37:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-26 19:37:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:37:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-26 19:37:03,277 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2020-10-26 19:37:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:03,277 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-26 19:37:03,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:37:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-26 19:37:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:37:03,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:03,279 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] [2020-10-26 19:37:03,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:37:03,279 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1894992585, now seen corresponding path program 1 times [2020-10-26 19:37:03,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:03,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579534802] [2020-10-26 19:37:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:03,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:37:03,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:04,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:04,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:04,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:04,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:04,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:04,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:04,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:04,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:04,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:04,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:04,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:04,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:04,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579534802] [2020-10-26 19:37:04,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:37:04,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-26 19:37:04,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146166400] [2020-10-26 19:37:04,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:37:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:37:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:37:04,096 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 8 states. [2020-10-26 19:37:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:04,356 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-26 19:37:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:37:04,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:37:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:04,358 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:37:04,358 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:37:04,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:37:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:37:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:37:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:37:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-26 19:37:04,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-26 19:37:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:04,368 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-26 19:37:04,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:37:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-26 19:37:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:37:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:04,370 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:37:04,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:37:04,371 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914284, now seen corresponding path program 1 times [2020-10-26 19:37:04,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:04,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067482920] [2020-10-26 19:37:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:04,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:05,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:06,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:07,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:37:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:37:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:37:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:09,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:09,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:09,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:37:09,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:09,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:09,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:37:09,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:09,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:09,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:09,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:09,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:09,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067482920] [2020-10-26 19:37:09,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:09,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149070572] [2020-10-26 19:37:09,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:09,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:09,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:09,847 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 16 states. [2020-10-26 19:37:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:10,519 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-26 19:37:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:37:10,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-26 19:37:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:10,521 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:37:10,521 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:37:10,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:37:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:37:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-10-26 19:37:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:37:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-26 19:37:10,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 34 [2020-10-26 19:37:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:10,541 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-26 19:37:10,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-26 19:37:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:10,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:10,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:37:10,545 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -447454014, now seen corresponding path program 2 times [2020-10-26 19:37:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:10,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205226764] [2020-10-26 19:37:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:14,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:15,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-26 19:37:15,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:37:15,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:37:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:15,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:15,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:16,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:16,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:16,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:16,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:16,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:16,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:16,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:16,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:16,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:16,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:16,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:16,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205226764] [2020-10-26 19:37:16,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:16,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:37:16,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140550868] [2020-10-26 19:37:16,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:37:16,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:37:16,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:37:16,277 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 19 states. [2020-10-26 19:37:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:17,541 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-26 19:37:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:37:17,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-26 19:37:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:17,545 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:37:17,545 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:37:17,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:37:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:37:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-26 19:37:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:37:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-26 19:37:17,554 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 37 [2020-10-26 19:37:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:17,555 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-26 19:37:17,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:37:17,555 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-26 19:37:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:37:17,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:17,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:17,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:37:17,557 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1090575102, now seen corresponding path program 3 times [2020-10-26 19:37:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:17,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609181861] [2020-10-26 19:37:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:21,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:22,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:37:22,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:23,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:23,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:23,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:37:23,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:23,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:23,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:23,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:23,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:23,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:23,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:23,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:37:23,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:23,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:23,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:37:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:37:23,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609181861] [2020-10-26 19:37:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:37:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323249388] [2020-10-26 19:37:23,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:37:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:37:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:37:23,558 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 19 states. [2020-10-26 19:37:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:25,080 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2020-10-26 19:37:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:37:25,081 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-26 19:37:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:25,084 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:37:25,084 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:37:25,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:37:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:37:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-26 19:37:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:37:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-26 19:37:25,096 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 37 [2020-10-26 19:37:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:25,097 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-26 19:37:25,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:37:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-26 19:37:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:25,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:25,098 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:25,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:37:25,099 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1003722988, now seen corresponding path program 4 times [2020-10-26 19:37:25,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:25,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156591865] [2020-10-26 19:37:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:28,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:30,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:37:30,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:37:30,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:37:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:37:30,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:30,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:30,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:30,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:30,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:30,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:30,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:37:30,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156591865] [2020-10-26 19:37:30,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:30,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:37:30,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532576346] [2020-10-26 19:37:30,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:37:30,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:37:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:37:30,373 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 13 states. [2020-10-26 19:37:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:31,008 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-26 19:37:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:37:31,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-26 19:37:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:31,010 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:37:31,010 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:37:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:37:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:37:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-10-26 19:37:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:37:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:37:31,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 40 [2020-10-26 19:37:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:31,020 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:37:31,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:37:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:37:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:37:31,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:31,021 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:31,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:37:31,022 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash -264327849, now seen corresponding path program 5 times [2020-10-26 19:37:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:31,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938811738] [2020-10-26 19:37:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:33,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:34,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:36,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:36,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:37:36,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:37:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-26 19:37:36,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:37:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:36,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:37:36,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:36,775 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-10-26 19:37:37,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:37,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:37,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:37,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:37,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:37,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:37,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938811738] [2020-10-26 19:37:37,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:37,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:37:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569339012] [2020-10-26 19:37:37,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:37:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:37,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:37:37,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:37:37,246 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 20 states. [2020-10-26 19:37:37,610 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 19:37:38,082 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-26 19:37:38,375 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-26 19:37:38,537 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-26 19:37:38,690 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-26 19:37:39,035 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-26 19:37:39,473 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-26 19:37:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:39,762 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-10-26 19:37:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:37:39,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-26 19:37:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:39,765 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:37:39,765 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:37:39,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:37:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:37:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-26 19:37:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:37:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-26 19:37:39,779 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 40 [2020-10-26 19:37:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:39,779 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-26 19:37:39,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:37:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-26 19:37:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:39,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:39,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:37:39,781 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1529169449, now seen corresponding path program 6 times [2020-10-26 19:37:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572838244] [2020-10-26 19:37:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:44,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:44,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:44,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-26 19:37:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:37:44,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:44,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:37:44,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:44,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:37:44,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:45,179 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-26 19:37:45,514 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-26 19:37:45,649 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 19:37:46,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:46,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:46,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:46,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:46,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:46,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:46,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:46,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:46,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:46,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:46,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:46,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:46,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:37:46,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572838244] [2020-10-26 19:37:46,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:46,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:37:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557189877] [2020-10-26 19:37:46,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:37:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:37:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:37:46,202 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 21 states. [2020-10-26 19:37:46,789 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-26 19:37:47,273 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-26 19:37:47,543 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-26 19:37:47,806 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-26 19:37:48,469 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-26 19:37:48,845 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-26 19:37:49,408 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-26 19:37:49,573 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-26 19:37:49,854 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-26 19:37:50,220 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-26 19:37:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:50,682 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-10-26 19:37:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:37:50,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-26 19:37:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:50,685 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:37:50,685 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:37:50,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=505, Invalid=2045, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:37:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:37:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-10-26 19:37:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:37:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-10-26 19:37:50,713 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 43 [2020-10-26 19:37:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:50,714 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-10-26 19:37:50,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:37:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-10-26 19:37:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:50,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:50,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:50,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:37:50,721 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -814888421, now seen corresponding path program 7 times [2020-10-26 19:37:50,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:50,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442517939] [2020-10-26 19:37:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:50,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:50,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:51,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:52,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:55,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:55,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:37:55,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:37:55,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:37:55,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:37:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:37:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:37:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:56,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:37:56,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:56,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:37:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:56,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:37:56,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:37:56,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442517939] [2020-10-26 19:37:56,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:56,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:37:56,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868598839] [2020-10-26 19:37:56,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:37:56,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:56,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:37:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:37:56,116 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 16 states. [2020-10-26 19:37:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:57,099 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-10-26 19:37:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:37:57,100 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-26 19:37:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:57,102 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:37:57,102 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:37:57,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:37:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:37:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-26 19:37:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:37:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-26 19:37:57,116 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 43 [2020-10-26 19:37:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:57,116 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-26 19:37:57,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:37:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-26 19:37:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:37:57,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:57,118 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:57,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:37:57,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash 742155168, now seen corresponding path program 8 times [2020-10-26 19:37:57,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:57,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032570110] [2020-10-26 19:37:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:57,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:58,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:38:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:02,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:02,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:02,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:02,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:02,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032570110] [2020-10-26 19:38:02,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:02,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:38:02,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132628380] [2020-10-26 19:38:02,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:38:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:38:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:38:02,350 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 12 states. [2020-10-26 19:38:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:02,878 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2020-10-26 19:38:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:38:02,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-26 19:38:02,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:02,879 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:38:02,879 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:38:02,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:38:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:38:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2020-10-26 19:38:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:38:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-26 19:38:02,891 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 43 [2020-10-26 19:38:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:02,891 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-26 19:38:02,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:38:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-26 19:38:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:38:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:02,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:02,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:38:02,892 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash 153977650, now seen corresponding path program 9 times [2020-10-26 19:38:02,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:02,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369141165] [2020-10-26 19:38:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:02,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:04,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:07,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:38:07,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:07,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:38:07,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:08,343 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-10-26 19:38:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:08,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:08,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:08,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369141165] [2020-10-26 19:38:09,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:09,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:38:09,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911931547] [2020-10-26 19:38:09,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:38:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:38:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:38:09,005 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 25 states. [2020-10-26 19:38:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:12,416 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-26 19:38:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:38:12,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-26 19:38:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:12,418 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:38:12,418 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:38:12,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:38:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:38:12,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-26 19:38:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:38:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-26 19:38:12,432 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2020-10-26 19:38:12,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:12,432 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-26 19:38:12,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:38:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-26 19:38:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:12,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:12,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:12,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:38:12,434 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1224106592, now seen corresponding path program 10 times [2020-10-26 19:38:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:12,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030618608] [2020-10-26 19:38:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:13,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:15,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:17,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:38:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:17,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:17,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:17,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:17,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:17,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030618608] [2020-10-26 19:38:17,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:17,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:38:17,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208634504] [2020-10-26 19:38:17,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:38:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:38:17,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:38:17,929 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 19 states. [2020-10-26 19:38:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:19,095 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:38:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:38:19,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-26 19:38:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:19,097 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:38:19,097 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:38:19,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=350, Invalid=1210, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:38:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:38:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2020-10-26 19:38:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:38:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-26 19:38:19,111 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 49 [2020-10-26 19:38:19,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:19,111 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-26 19:38:19,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:38:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-26 19:38:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:38:19,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:19,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:19,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:38:19,113 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash -342568643, now seen corresponding path program 11 times [2020-10-26 19:38:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:19,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205730295] [2020-10-26 19:38:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:20,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:21,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:24,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:38:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:24,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:24,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:24,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:24,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:24,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:24,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205730295] [2020-10-26 19:38:24,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:24,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:38:24,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638966750] [2020-10-26 19:38:24,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:38:24,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:38:24,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:38:24,452 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 17 states. [2020-10-26 19:38:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:25,292 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-26 19:38:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:38:25,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-26 19:38:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:25,294 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:38:25,294 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:38:25,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:38:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:38:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-10-26 19:38:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:38:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:38:25,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 49 [2020-10-26 19:38:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:38:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:38:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:38:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:38:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:25,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:25,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:38:25,313 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 480859253, now seen corresponding path program 12 times [2020-10-26 19:38:25,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439051638] [2020-10-26 19:38:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:27,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:29,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:30,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:38:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:30,950 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-26 19:38:31,087 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-26 19:38:31,268 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-26 19:38:31,649 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-26 19:38:31,917 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-26 19:38:32,256 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2020-10-26 19:38:32,574 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-26 19:38:32,877 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-26 19:38:33,041 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-26 19:38:33,226 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-26 19:38:33,420 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-26 19:38:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:33,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:33,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:33,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:33,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:38:33,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439051638] [2020-10-26 19:38:33,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:33,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:38:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157741639] [2020-10-26 19:38:33,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:38:33,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:38:33,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:38:33,904 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 28 states. [2020-10-26 19:38:36,579 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 83 [2020-10-26 19:38:36,766 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-26 19:38:38,455 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 167 DAG size of output: 150 [2020-10-26 19:38:39,121 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2020-10-26 19:38:40,645 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2020-10-26 19:38:42,403 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 170 DAG size of output: 153 [2020-10-26 19:38:42,687 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-26 19:38:43,740 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2020-10-26 19:38:45,572 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 175 DAG size of output: 157 [2020-10-26 19:38:46,206 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-10-26 19:38:46,895 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-10-26 19:38:47,569 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-10-26 19:38:47,971 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-26 19:38:48,420 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-10-26 19:38:48,731 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-26 19:38:50,563 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2020-10-26 19:38:52,281 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 165 DAG size of output: 147 [2020-10-26 19:38:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:52,593 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-26 19:38:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:38:52,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2020-10-26 19:38:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:52,595 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:38:52,595 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:38:52,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=493, Invalid=3539, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:38:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:38:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-26 19:38:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:38:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-26 19:38:52,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 52 [2020-10-26 19:38:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:52,611 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-26 19:38:52,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:38:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-26 19:38:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:52,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:52,612 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:52,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:38:52,612 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1864557886, now seen corresponding path program 13 times [2020-10-26 19:38:52,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:52,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814996513] [2020-10-26 19:38:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:53,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:54,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:55,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:38:57,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:57,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:57,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:57,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:57,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:57,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:38:57,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:57,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:57,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814996513] [2020-10-26 19:38:57,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:38:57,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:38:57,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278151233] [2020-10-26 19:38:57,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:38:57,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:38:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:38:57,921 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 16 states. [2020-10-26 19:38:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:58,937 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2020-10-26 19:38:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:38:58,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-26 19:38:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:58,940 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:38:58,940 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:38:58,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:38:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:38:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 57. [2020-10-26 19:38:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:38:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:38:58,956 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2020-10-26 19:38:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:58,957 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:38:58,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:38:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:38:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:38:58,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:58,958 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:58,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:38:58,958 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1631885763, now seen corresponding path program 14 times [2020-10-26 19:38:58,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:58,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74058082] [2020-10-26 19:38:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:01,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:03,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:39:03,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:04,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:04,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:04,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:04,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:04,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:39:04,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:04,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:04,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:04,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:04,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:04,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:04,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:04,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:04,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:04,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:04,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:04,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:04,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74058082] [2020-10-26 19:39:04,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:04,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:39:04,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717805488] [2020-10-26 19:39:04,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:39:04,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:39:04,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:39:04,772 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 22 states. [2020-10-26 19:39:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:06,340 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-26 19:39:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:39:06,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-10-26 19:39:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:06,342 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:39:06,343 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:39:06,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:39:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:39:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-26 19:39:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:39:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-10-26 19:39:06,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 55 [2020-10-26 19:39:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:06,358 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-10-26 19:39:06,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:39:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-10-26 19:39:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:39:06,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:06,359 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 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 19:39:06,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:39:06,359 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1607709842, now seen corresponding path program 15 times [2020-10-26 19:39:06,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:06,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635990738] [2020-10-26 19:39:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:06,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:07,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:08,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:39:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:12,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:12,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:12,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:12,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:12,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:12,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:12,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:12,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635990738] [2020-10-26 19:39:12,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:12,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:39:12,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903995226] [2020-10-26 19:39:12,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:39:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:39:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:39:12,832 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 29 states. [2020-10-26 19:39:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:15,762 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-26 19:39:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:39:15,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-26 19:39:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:15,765 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:39:15,765 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:39:15,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:39:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:39:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-26 19:39:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:39:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-26 19:39:15,777 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2020-10-26 19:39:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:15,778 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-26 19:39:15,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:39:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-26 19:39:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:39:15,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:15,778 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 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 19:39:15,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:39:15,779 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1090374400, now seen corresponding path program 16 times [2020-10-26 19:39:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:15,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185664162] [2020-10-26 19:39:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:15,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:20,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:20,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:39:20,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:39:20,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:39:20,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:39:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:39:20,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:21,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:21,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:21,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:21,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:39:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185664162] [2020-10-26 19:39:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:21,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:39:21,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990451738] [2020-10-26 19:39:21,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:39:21,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:39:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:39:21,520 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-10-26 19:39:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:23,307 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2020-10-26 19:39:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:39:23,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-26 19:39:23,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:23,309 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:39:23,310 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:39:23,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=578, Invalid=2178, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:39:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:39:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-26 19:39:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:39:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-26 19:39:23,323 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 61 [2020-10-26 19:39:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:23,323 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-26 19:39:23,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:39:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-26 19:39:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:39:23,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:23,324 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:23,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:39:23,324 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash -197578793, now seen corresponding path program 17 times [2020-10-26 19:39:23,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:23,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053187165] [2020-10-26 19:39:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:23,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:24,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:24,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:26,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:39:28,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:29,005 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-26 19:39:29,744 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-26 19:39:30,032 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:39:30,198 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-26 19:39:30,385 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-26 19:39:30,572 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-26 19:39:30,769 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-26 19:39:30,982 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-26 19:39:31,189 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-26 19:39:31,374 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-26 19:39:31,557 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-26 19:39:31,722 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-26 19:39:32,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:32,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:32,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:32,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:39:32,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:39:32,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053187165] [2020-10-26 19:39:32,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:32,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:39:32,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595551303] [2020-10-26 19:39:32,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:39:32,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:39:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:39:32,331 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 37 states. [2020-10-26 19:39:34,299 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2020-10-26 19:39:34,853 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-26 19:39:35,066 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-26 19:39:35,485 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2020-10-26 19:39:35,898 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-10-26 19:39:36,272 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-26 19:39:36,596 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-26 19:39:36,930 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-10-26 19:39:37,270 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2020-10-26 19:39:37,611 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-26 19:39:37,977 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-26 19:39:38,583 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-26 19:39:38,914 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-26 19:39:39,247 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-26 19:39:39,647 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-26 19:39:39,958 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-26 19:39:40,368 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-26 19:39:40,792 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-26 19:39:41,134 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-10-26 19:39:41,657 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2020-10-26 19:39:42,185 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 84 [2020-10-26 19:39:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:42,507 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-10-26 19:39:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:39:42,508 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 64 [2020-10-26 19:39:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:42,509 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:39:42,509 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:39:42,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=928, Invalid=4924, Unknown=0, NotChecked=0, Total=5852 [2020-10-26 19:39:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:39:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-10-26 19:39:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:39:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-26 19:39:42,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2020-10-26 19:39:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:42,529 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-26 19:39:42,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:39:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-26 19:39:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:39:42,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:42,531 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:42,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:39:42,531 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1656114784, now seen corresponding path program 18 times [2020-10-26 19:39:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:42,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865145650] [2020-10-26 19:39:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:42,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:44,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:45,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:46,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 19:39:47,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:48,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:48,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:48,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:48,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:48,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:48,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:48,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:48,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 37 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:39:48,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865145650] [2020-10-26 19:39:48,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:48,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:39:48,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271892936] [2020-10-26 19:39:48,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:39:48,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:48,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:39:48,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:39:48,092 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 23 states. [2020-10-26 19:39:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:50,049 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-10-26 19:39:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:39:50,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-10-26 19:39:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:50,053 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:39:50,054 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:39:50,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:39:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:39:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2020-10-26 19:39:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:39:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-26 19:39:50,073 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 67 [2020-10-26 19:39:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:50,073 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-26 19:39:50,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:39:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-26 19:39:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:39:50,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:50,074 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 3, 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 19:39:50,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:39:50,074 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1794847010, now seen corresponding path program 19 times [2020-10-26 19:39:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:50,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031153137] [2020-10-26 19:39:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:50,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:50,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:52,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:54,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:55,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:39:55,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:39:55,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:39:55,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:39:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:39:55,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:39:55,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:55,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:39:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:55,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:55,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:39:55,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:55,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:55,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:39:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:55,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:39:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:39:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:39:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:39:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:39:55,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031153137] [2020-10-26 19:39:55,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:39:55,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:39:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507840189] [2020-10-26 19:39:55,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:39:55,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:39:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:39:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:39:55,367 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 10 states. [2020-10-26 19:39:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:39:55,912 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-10-26 19:39:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:39:55,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-26 19:39:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:39:55,917 INFO L225 Difference]: With dead ends: 151 [2020-10-26 19:39:55,917 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:39:55,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:39:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:39:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2020-10-26 19:39:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:39:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-26 19:39:55,936 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 67 [2020-10-26 19:39:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:39:55,937 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-26 19:39:55,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:39:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-26 19:39:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:39:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:39:55,937 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:39:55,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:39:55,938 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:39:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:39:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 74806578, now seen corresponding path program 20 times [2020-10-26 19:39:55,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:39:55,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847729229] [2020-10-26 19:39:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:39:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:39:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:39:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:00,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:40:00,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:00,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:40:00,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:01,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:01,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:01,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:01,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:01,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:40:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847729229] [2020-10-26 19:40:01,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:01,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:40:01,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070864170] [2020-10-26 19:40:01,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:40:01,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:01,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:40:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:40:01,197 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 11 states. [2020-10-26 19:40:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:01,824 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-10-26 19:40:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:40:01,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-26 19:40:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:01,826 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:40:01,827 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:40:01,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:40:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:40:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-10-26 19:40:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:40:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-10-26 19:40:01,846 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 70 [2020-10-26 19:40:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:01,846 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-10-26 19:40:01,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:40:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-10-26 19:40:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:40:01,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:01,847 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 5, 3, 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 19:40:01,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:40:01,847 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash -769198924, now seen corresponding path program 21 times [2020-10-26 19:40:01,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:01,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657536850] [2020-10-26 19:40:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:01,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:02,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:05,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:06,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:06,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:06,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:40:06,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:09,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:09,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:09,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:09,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:09,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:09,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:09,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:09,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:09,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:09,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:09,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:09,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657536850] [2020-10-26 19:40:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:09,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:40:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170072811] [2020-10-26 19:40:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:40:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:40:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:40:09,823 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 37 states. [2020-10-26 19:40:11,612 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-26 19:40:11,934 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-26 19:40:12,342 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-26 19:40:12,805 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-26 19:40:13,853 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-26 19:40:14,054 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-26 19:40:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:14,799 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-10-26 19:40:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:40:14,800 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2020-10-26 19:40:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:14,802 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:40:14,802 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:40:14,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=195, Invalid=2667, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:40:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:40:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-10-26 19:40:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:40:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2020-10-26 19:40:14,830 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 70 [2020-10-26 19:40:14,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:14,830 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2020-10-26 19:40:14,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:40:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2020-10-26 19:40:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:40:14,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:14,831 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 5, 4, 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 19:40:14,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:40:14,832 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1561694535, now seen corresponding path program 22 times [2020-10-26 19:40:14,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:14,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976373608] [2020-10-26 19:40:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:15,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:17,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:19,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:19,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:40:19,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:40:19,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:40:19,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:19,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:40:19,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:19,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:40:19,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:20,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:20,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:20,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:20,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 92 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:20,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976373608] [2020-10-26 19:40:20,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:20,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:40:20,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628476609] [2020-10-26 19:40:20,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:40:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:40:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:40:20,235 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 21 states. [2020-10-26 19:40:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:21,597 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2020-10-26 19:40:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:40:21,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-26 19:40:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:21,600 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:40:21,600 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:40:21,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:40:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:40:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 75. [2020-10-26 19:40:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:40:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-26 19:40:21,619 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-26 19:40:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:21,619 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-26 19:40:21,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:40:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-26 19:40:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:40:21,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:21,620 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 3, 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 19:40:21,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:40:21,621 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -453613154, now seen corresponding path program 23 times [2020-10-26 19:40:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230714225] [2020-10-26 19:40:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:25,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:26,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:26,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:40:26,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:40:26,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:40:26,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:26,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:40:26,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:26,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:40:26,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:27,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:27,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:27,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:27,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:27,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230714225] [2020-10-26 19:40:27,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:27,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:40:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054256234] [2020-10-26 19:40:27,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:40:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:27,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:40:27,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:40:27,051 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 22 states. [2020-10-26 19:40:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:28,247 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-26 19:40:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:40:28,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-26 19:40:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:28,249 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:40:28,249 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:40:28,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=1198, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:40:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:40:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-26 19:40:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:40:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-26 19:40:28,270 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 73 [2020-10-26 19:40:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:28,270 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-26 19:40:28,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:40:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-26 19:40:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:40:28,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:28,271 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 6, 3, 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 19:40:28,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:40:28,271 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1456549879, now seen corresponding path program 24 times [2020-10-26 19:40:28,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:28,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285283045] [2020-10-26 19:40:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:28,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:30,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:32,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:40:33,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:36,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:36,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:36,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:36,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:40:36,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:36,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:36,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285283045] [2020-10-26 19:40:37,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:37,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:40:37,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361802923] [2020-10-26 19:40:37,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:40:37,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:40:37,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:40:37,004 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 41 states. [2020-10-26 19:40:38,636 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:40:39,385 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-10-26 19:40:39,742 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-26 19:40:40,065 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-26 19:40:40,344 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-26 19:40:40,573 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-26 19:40:40,883 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-26 19:40:41,203 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-26 19:40:41,440 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:40:41,647 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-26 19:40:41,958 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-26 19:40:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:42,783 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-26 19:40:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:40:42,784 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2020-10-26 19:40:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:42,785 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:40:42,785 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:40:42,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=270, Invalid=2922, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:40:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:40:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-26 19:40:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:40:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:40:42,804 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 76 [2020-10-26 19:40:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:42,804 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:40:42,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:40:42,805 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:40:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:40:42,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:42,805 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 3, 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 19:40:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:40:42,806 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:42,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1123861371, now seen corresponding path program 25 times [2020-10-26 19:40:42,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:42,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985954631] [2020-10-26 19:40:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:42,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking...