/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:37:08,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:37:08,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:37:08,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:37:08,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:37:08,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:37:08,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:37:08,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:37:08,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:37:08,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:37:08,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:37:08,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:37:08,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:37:08,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:37:08,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:37:08,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:37:08,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:37:08,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:37:08,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:37:08,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:37:08,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:37:08,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:37:08,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:37:08,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:37:08,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:37:08,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:37:08,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:37:08,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:37:08,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:37:08,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:37:08,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:37:08,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:37:08,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:37:08,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:37:08,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:37:08,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:37:08,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:37:08,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:37:08,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:37:08,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:37:08,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:37:08,388 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 [2020-10-29 09:37:08,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:37:08,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:37:08,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:37:08,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:37:08,439 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:37:08,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:37:08,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:37:08,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:37:08,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:37:08,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:37:08,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:37:08,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:37:08,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:37:08,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:37:08,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:37:08,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:37:08,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:37:08,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:37:08,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:37:08,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:37:08,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:37:08,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:37:08,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:37:08,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:37:08,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:37:08,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:37:08,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:37:08,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:37:08,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:37:08,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:37:08,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:37:08,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:37:08,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:37:08,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:37:08,928 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:37:08,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-29 09:37:09,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563961957/9c1d4fa0cc3848df928561010269b435/FLAGe6efd4983 [2020-10-29 09:37:09,670 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:37:09,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-1.c [2020-10-29 09:37:09,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563961957/9c1d4fa0cc3848df928561010269b435/FLAGe6efd4983 [2020-10-29 09:37:10,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563961957/9c1d4fa0cc3848df928561010269b435 [2020-10-29 09:37:10,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:37:10,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:37:10,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:10,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:37:10,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:37:10,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ba116a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10, skipping insertion in model container [2020-10-29 09:37:10,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:37:10,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:37:10,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:10,242 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:37:10,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:10,274 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:37:10,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10 WrapperNode [2020-10-29 09:37:10,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:10,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:37:10,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:37:10,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:37:10,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (1/1) ... [2020-10-29 09:37:10,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:37:10,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:37:10,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:37:10,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:37:10,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (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 [2020-10-29 09:37:10,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:37:10,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:37:10,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:37:10,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:37:10,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:37:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:37:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:37:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:37:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:37:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:37:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:37:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:37:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:37:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:37:10,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:37:10,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:37:10,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:37:10,675 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:37:10,676 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:37:10,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:10 BoogieIcfgContainer [2020-10-29 09:37:10,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:37:10,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:37:10,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:37:10,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:37:10,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:37:10" (1/3) ... [2020-10-29 09:37:10,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ffd7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:10, skipping insertion in model container [2020-10-29 09:37:10,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:10" (2/3) ... [2020-10-29 09:37:10,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ffd7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:10, skipping insertion in model container [2020-10-29 09:37:10,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:10" (3/3) ... [2020-10-29 09:37:10,687 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2020-10-29 09:37:10,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:37:10,708 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:37:10,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:37:10,761 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:37:10,761 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:37:10,762 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:37:10,762 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:37:10,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:37:10,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:37:10,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:37:10,763 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:37:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-29 09:37:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:37:10,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:10,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:10,791 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-29 09:37:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543506157] [2020-10-29 09:37:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:11,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:37:11,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:11,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-29 09:37:11,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:11,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:37:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:11,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:11,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:11,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 09:37:11,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:11,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:37:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543506157] [2020-10-29 09:37:11,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:11,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:37:11,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901424472] [2020-10-29 09:37:11,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:37:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:37:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:37:11,382 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-29 09:37:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:11,487 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-29 09:37:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:37:11,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:37:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:11,500 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:37:11,500 INFO L226 Difference]: Without dead ends: 13 [2020-10-29 09:37:11,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:37:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-29 09:37:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-29 09:37:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-29 09:37:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-29 09:37:11,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-29 09:37:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-29 09:37:11,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:37:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-29 09:37:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:37:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:11,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:11,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:37:11,567 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-29 09:37:11,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:11,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338551555] [2020-10-29 09:37:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:11,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:37:11,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-29 09:37:11,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:11,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:37:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:37:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:11,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:11,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:11,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:11,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:11,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:11,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:11,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338551555] [2020-10-29 09:37:11,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:11,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:37:11,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195354706] [2020-10-29 09:37:11,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:37:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:37:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:37:11,909 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-29 09:37:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:11,986 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-29 09:37:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:37:11,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:37:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:11,988 INFO L225 Difference]: With dead ends: 20 [2020-10-29 09:37:11,988 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:37:11,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:37:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:37:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:37:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-29 09:37:11,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-29 09:37:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:11,998 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-29 09:37:11,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:37:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-29 09:37:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:37:11,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:11,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:11,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:37:12,000 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-29 09:37:12,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:12,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628890974] [2020-10-29 09:37:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:12,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:37:12,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-29 09:37:12,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:12,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:12,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:37:12,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:12,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:37:12,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:37:12,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:12,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:12,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:12,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:12,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:12,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:37:12,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:12,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:12,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:12,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:12,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628890974] [2020-10-29 09:37:12,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:12,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:37:12,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666716103] [2020-10-29 09:37:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:37:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:37:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:12,363 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-29 09:37:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:12,557 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-29 09:37:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:12,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-29 09:37:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:12,558 INFO L225 Difference]: With dead ends: 21 [2020-10-29 09:37:12,559 INFO L226 Difference]: Without dead ends: 15 [2020-10-29 09:37:12,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-29 09:37:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-29 09:37:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-29 09:37:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-29 09:37:12,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-29 09:37:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:12,573 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-29 09:37:12,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:37:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-29 09:37:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:37:12,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:12,574 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:12,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:37:12,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-29 09:37:12,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:12,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584699783] [2020-10-29 09:37:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:12,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:12,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:37:12,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:12,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 09:37:12,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:12,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:12,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:37:12,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:12,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:37:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:37:12,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:12,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:12,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:12,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:12,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:12,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:12,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:12,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:12,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584699783] [2020-10-29 09:37:12,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:12,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:37:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604342467] [2020-10-29 09:37:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:37:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:37:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:37:12,941 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-29 09:37:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:13,105 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-29 09:37:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:37:13,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-29 09:37:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:13,107 INFO L225 Difference]: With dead ends: 22 [2020-10-29 09:37:13,107 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:37:13,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:37:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:37:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:37:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-29 09:37:13,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-29 09:37:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:13,114 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-29 09:37:13,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:37:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-29 09:37:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:37:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:13,115 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:13,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:37:13,115 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-29 09:37:13,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:13,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934138949] [2020-10-29 09:37:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:13,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:13,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:37:13,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-29 09:37:13,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:13,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:37:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:37:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:13,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:13,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:13,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:13,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:37:13,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:13,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:13,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:13,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934138949] [2020-10-29 09:37:13,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:13,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:37:13,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645256712] [2020-10-29 09:37:13,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:37:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:37:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:13,345 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-29 09:37:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:13,539 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-29 09:37:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:37:13,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:37:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:13,540 INFO L225 Difference]: With dead ends: 23 [2020-10-29 09:37:13,540 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:37:13,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:37:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:37:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:37:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-29 09:37:13,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-29 09:37:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:13,547 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-29 09:37:13,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:37:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-29 09:37:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:37:13,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:13,548 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:13,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:37:13,549 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:13,549 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-29 09:37:13,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:13,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606138711] [2020-10-29 09:37:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:13,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:13,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:13,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:37:13,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:13,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-29 09:37:13,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:13,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:37:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:37:13,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:13,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:13,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:13,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:13,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:13,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:13,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606138711] [2020-10-29 09:37:13,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:13,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:37:13,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766189571] [2020-10-29 09:37:13,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:37:13,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:13,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:37:13,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:13,804 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-29 09:37:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:14,027 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-29 09:37:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:37:14,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:37:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:14,029 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:37:14,029 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:37:14,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:37:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:37:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:37:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:37:14,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-29 09:37:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:14,036 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:37:14,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:37:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:37:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:37:14,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:14,037 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:14,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:37:14,037 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-29 09:37:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:14,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770823888] [2020-10-29 09:37:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:14,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:37:14,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-29 09:37:14,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:37:14,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:14,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:37:14,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:14,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:14,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:14,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770823888] [2020-10-29 09:37:14,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:37:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018261561] [2020-10-29 09:37:14,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:37:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:37:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:14,321 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-29 09:37:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:14,583 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-29 09:37:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:37:14,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-29 09:37:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:14,585 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:37:14,585 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:37:14,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:37:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:37:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:37:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-29 09:37:14,591 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-29 09:37:14,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:14,592 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-29 09:37:14,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:37:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-29 09:37:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:37:14,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:14,593 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:14,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:37:14,593 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-29 09:37:14,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:14,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553996889] [2020-10-29 09:37:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:37:14,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-29 09:37:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:37:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:37:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:14,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:14,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553996889] [2020-10-29 09:37:14,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:14,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:37:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394521150] [2020-10-29 09:37:14,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:37:14,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:14,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:37:14,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:37:14,952 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-29 09:37:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:15,443 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-29 09:37:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:37:15,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-29 09:37:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:15,444 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:37:15,444 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:37:15,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:37:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:37:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:37:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-29 09:37:15,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-29 09:37:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:15,452 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-29 09:37:15,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:37:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-29 09:37:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:37:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:15,453 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:15,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:37:15,454 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-29 09:37:15,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:15,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229627812] [2020-10-29 09:37:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:15,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:15,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:37:15,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:15,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-29 09:37:15,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:15,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:37:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:37:15,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:15,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:15,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:15,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:15,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:15,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:15,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:15,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:15,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:37:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:15,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229627812] [2020-10-29 09:37:15,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:15,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:37:15,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36702181] [2020-10-29 09:37:15,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:37:15,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:37:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:15,861 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-29 09:37:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:16,299 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-29 09:37:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:37:16,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-29 09:37:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:16,301 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:37:16,301 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:37:16,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:37:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:37:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:37:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:37:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-29 09:37:16,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-29 09:37:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:16,314 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-29 09:37:16,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:37:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-29 09:37:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:37:16,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:16,315 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:16,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:37:16,315 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-29 09:37:16,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:16,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584122368] [2020-10-29 09:37:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:16,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:16,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:37:16,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-29 09:37:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:16,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:37:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:16,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:37:16,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:16,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:16,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:16,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:16,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:16,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584122368] [2020-10-29 09:37:16,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:37:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322543608] [2020-10-29 09:37:16,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:37:16,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:37:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:37:16,790 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-29 09:37:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:17,323 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-29 09:37:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:37:17,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-29 09:37:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:17,324 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:37:17,325 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:37:17,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:37:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:37:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:37:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:37:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-29 09:37:17,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-29 09:37:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-29 09:37:17,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:37:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-29 09:37:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:37:17,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:17,343 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:37:17,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-29 09:37:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:17,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030087981] [2020-10-29 09:37:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:17,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:37:17,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-29 09:37:17,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:17,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:37:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:17,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:37:17,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:17,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:17,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:17,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:17,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030087981] [2020-10-29 09:37:17,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:17,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:37:17,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880836726] [2020-10-29 09:37:17,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:37:17,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:37:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:17,993 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-29 09:37:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:18,561 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-29 09:37:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:37:18,561 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-29 09:37:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:18,562 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:37:18,562 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:37:18,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:37:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:37:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:37:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:37:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-29 09:37:18,577 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-29 09:37:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:18,577 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-29 09:37:18,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:37:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-29 09:37:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:37:18,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:18,578 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:18,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:37:18,579 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-29 09:37:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984710683] [2020-10-29 09:37:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:18,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:18,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:37:18,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:18,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:37:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:19,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:19,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:19,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:19,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:19,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:19,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984710683] [2020-10-29 09:37:19,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:19,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:37:19,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907876801] [2020-10-29 09:37:19,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:37:19,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:37:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:37:19,134 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-29 09:37:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:19,735 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-29 09:37:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:37:19,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-29 09:37:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:19,736 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:37:19,736 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:37:19,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:37:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:37:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:37:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:37:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-29 09:37:19,744 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-29 09:37:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:19,744 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-29 09:37:19,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:37:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-29 09:37:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:37:19,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:19,745 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:19,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:37:19,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-29 09:37:19,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:19,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067758171] [2020-10-29 09:37:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:20,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:37:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:20,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:20,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:20,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:20,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:20,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:37:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:20,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:20,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067758171] [2020-10-29 09:37:20,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:20,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:37:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332686557] [2020-10-29 09:37:20,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:37:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:37:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:20,364 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-29 09:37:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:21,106 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-29 09:37:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:37:21,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-29 09:37:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:21,107 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:37:21,107 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:37:21,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:37:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:37:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:37:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:37:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-29 09:37:21,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-29 09:37:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:21,116 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-29 09:37:21,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:37:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-29 09:37:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:37:21,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:21,117 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:21,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:37:21,117 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-29 09:37:21,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:21,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802563719] [2020-10-29 09:37:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:21,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:21,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:37:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:37:21,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:21,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:21,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:21,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:21,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:21,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:21,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:21,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:21,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802563719] [2020-10-29 09:37:21,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:21,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:37:21,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564722988] [2020-10-29 09:37:21,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:37:21,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:37:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:37:21,705 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-29 09:37:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:22,509 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-29 09:37:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:37:22,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-29 09:37:22,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:22,511 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:37:22,511 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:37:22,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:37:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:37:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:37:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:37:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-29 09:37:22,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-29 09:37:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:22,520 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-29 09:37:22,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:37:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-29 09:37:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:37:22,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:22,521 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:22,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:37:22,521 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-29 09:37:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:22,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057332466] [2020-10-29 09:37:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:22,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:22,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:37:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:37:22,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:23,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:23,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:23,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:23,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:23,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057332466] [2020-10-29 09:37:23,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:23,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:37:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832253037] [2020-10-29 09:37:23,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:37:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:37:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:23,261 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-29 09:37:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:24,156 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-29 09:37:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:37:24,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-29 09:37:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:24,158 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:37:24,158 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:37:24,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:37:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:37:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:37:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:37:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-29 09:37:24,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-29 09:37:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:24,168 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-29 09:37:24,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:37:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-29 09:37:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:37:24,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:24,169 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:24,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:37:24,170 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-29 09:37:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:24,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370833879] [2020-10-29 09:37:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:24,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:24,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:24,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:37:24,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:24,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:37:24,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:24,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:25,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:25,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:25,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:25,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:25,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:25,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:25,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370833879] [2020-10-29 09:37:25,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:25,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:37:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952090104] [2020-10-29 09:37:25,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:37:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:37:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:37:25,014 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-29 09:37:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:26,032 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-29 09:37:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:37:26,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-29 09:37:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:26,035 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:37:26,035 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:37:26,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:37:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:37:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:37:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:37:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-29 09:37:26,043 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-29 09:37:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:26,044 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-29 09:37:26,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:37:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-29 09:37:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:37:26,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:26,045 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:26,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:37:26,045 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-29 09:37:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:26,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523737784] [2020-10-29 09:37:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:26,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:37:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:37:26,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:26,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:26,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:26,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:26,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:26,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523737784] [2020-10-29 09:37:26,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:26,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:37:26,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454731980] [2020-10-29 09:37:26,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:37:26,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:26,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:37:26,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:37:26,870 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-29 09:37:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:27,909 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-29 09:37:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:37:27,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-29 09:37:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:27,911 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:37:27,911 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:37:27,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:37:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:37:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:37:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:37:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-29 09:37:27,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-29 09:37:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:27,920 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-29 09:37:27,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:37:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-29 09:37:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:37:27,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:27,921 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:27,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:37:27,921 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-29 09:37:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498838868] [2020-10-29 09:37:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:27,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:28,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:28,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:37:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:28,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:28,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:28,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:28,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498838868] [2020-10-29 09:37:28,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:28,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:37:28,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125573478] [2020-10-29 09:37:28,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:37:28,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:37:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:37:28,950 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-29 09:37:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:30,129 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-29 09:37:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:37:30,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-29 09:37:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:30,131 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:37:30,131 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:37:30,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:37:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:37:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-29 09:37:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:37:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-29 09:37:30,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-29 09:37:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:30,139 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-29 09:37:30,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:37:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-29 09:37:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:37:30,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:30,140 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:30,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:37:30,140 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-29 09:37:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:30,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751850040] [2020-10-29 09:37:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:30,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:30,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:37:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:31,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:31,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:31,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:31,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751850040] [2020-10-29 09:37:31,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:31,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:37:31,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726358338] [2020-10-29 09:37:31,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:37:31,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:31,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:37:31,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:37:31,200 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-29 09:37:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:32,320 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-29 09:37:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:37:32,320 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-29 09:37:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:32,321 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:37:32,321 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:37:32,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:37:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:37:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:37:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:37:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-29 09:37:32,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-29 09:37:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:32,329 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-29 09:37:32,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:37:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-29 09:37:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:37:32,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:32,330 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:32,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:37:32,330 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:32,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-29 09:37:32,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:32,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845642302] [2020-10-29 09:37:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:32,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:32,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:32,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:37:32,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:32,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:37:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:33,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:33,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:33,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:33,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:33,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:33,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845642302] [2020-10-29 09:37:33,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:33,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:37:33,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711346046] [2020-10-29 09:37:33,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:37:33,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:37:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:37:33,291 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-29 09:37:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:34,601 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-29 09:37:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:37:34,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-29 09:37:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:34,602 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:37:34,602 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:37:34,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:37:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:37:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-29 09:37:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:37:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-29 09:37:34,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-29 09:37:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:34,611 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-29 09:37:34,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:37:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-29 09:37:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:37:34,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:34,612 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:34,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:37:34,612 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-29 09:37:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:34,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552830860] [2020-10-29 09:37:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:34,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:35,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:37:35,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:35,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:37:35,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:35,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:35,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:35,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:35,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:35,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552830860] [2020-10-29 09:37:35,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:35,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:37:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543340008] [2020-10-29 09:37:35,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:37:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:37:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:37:35,749 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-29 09:37:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:37,186 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-29 09:37:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:37:37,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-29 09:37:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:37,187 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:37:37,187 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:37:37,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:37:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:37:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:37:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:37:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-29 09:37:37,195 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-29 09:37:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:37,196 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-29 09:37:37,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:37:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-29 09:37:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:37:37,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:37,197 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:37,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:37:37,197 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-29 09:37:37,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:37,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878022365] [2020-10-29 09:37:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:38,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:38,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:37:38,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:38,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-29 09:37:38,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:38,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:37:38,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:38,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:37:38,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:38,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:37:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:38,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878022365] [2020-10-29 09:37:38,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:38,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:37:38,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734936214] [2020-10-29 09:37:38,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:37:38,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:38,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:37:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:37:38,744 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-29 09:37:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:40,247 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-29 09:37:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:37:40,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-29 09:37:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:40,254 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:37:40,254 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:37:40,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:37:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:37:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:37:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:37:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-29 09:37:40,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-29 09:37:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:40,262 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-29 09:37:40,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:37:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-29 09:37:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:37:40,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:40,263 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:40,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:37:40,264 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-29 09:37:40,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:40,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105995558] [2020-10-29 09:37:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:40,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:41,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:37:41,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:41,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:37:41,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:41,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:41,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:41,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:41,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:41,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:41,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105995558] [2020-10-29 09:37:41,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:41,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:37:41,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354611944] [2020-10-29 09:37:41,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:37:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:37:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:37:41,607 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-29 09:37:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:43,392 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-29 09:37:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:37:43,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-29 09:37:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:43,393 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:37:43,393 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:37:43,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:37:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:37:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:37:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:37:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-29 09:37:43,402 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-29 09:37:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:43,403 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-29 09:37:43,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:37:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-29 09:37:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:37:43,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:43,403 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:43,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:37:43,404 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-29 09:37:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:43,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390809516] [2020-10-29 09:37:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:43,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:44,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:37:44,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:44,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:37:44,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:44,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:44,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:44,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:44,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:44,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390809516] [2020-10-29 09:37:44,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:44,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:37:44,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837946705] [2020-10-29 09:37:44,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:37:44,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:37:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:37:44,856 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-29 09:37:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:46,714 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-29 09:37:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:37:46,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-29 09:37:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:46,715 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:37:46,715 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:37:46,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:37:46,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:37:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:37:46,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:37:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-29 09:37:46,723 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-29 09:37:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:46,723 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-29 09:37:46,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:37:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-29 09:37:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:37:46,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:46,724 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:46,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:37:46,725 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-29 09:37:46,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:46,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027899132] [2020-10-29 09:37:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:47,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:37:47,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:48,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:48,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:48,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027899132] [2020-10-29 09:37:48,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:48,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:37:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306442949] [2020-10-29 09:37:48,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:37:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:37:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:37:48,349 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-29 09:37:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:50,317 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-29 09:37:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:37:50,317 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-29 09:37:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:50,318 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:37:50,318 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:37:50,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:37:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:37:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:37:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:37:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-29 09:37:50,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-29 09:37:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:50,327 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-29 09:37:50,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:37:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-29 09:37:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:37:50,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:50,327 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:50,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:37:50,328 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:50,328 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-29 09:37:50,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:50,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543183869] [2020-10-29 09:37:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:37:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-29 09:37:51,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:37:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:37:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:51,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:51,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:51,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:51,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:52,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543183869] [2020-10-29 09:37:52,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:52,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:37:52,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011385468] [2020-10-29 09:37:52,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:37:52,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:37:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:37:52,006 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-29 09:37:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:54,101 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-29 09:37:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:37:54,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-29 09:37:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:54,102 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:37:54,102 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:37:54,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:37:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:37:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 09:37:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:37:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-29 09:37:54,110 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-29 09:37:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:54,110 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-29 09:37:54,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:37:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-29 09:37:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:37:54,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:54,111 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:54,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:37:54,111 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:54,112 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-29 09:37:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:54,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850639389] [2020-10-29 09:37:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:55,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:37:55,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:55,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-29 09:37:55,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:55,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:37:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:55,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:37:55,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:55,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:55,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:55,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:55,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850639389] [2020-10-29 09:37:55,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:55,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:37:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376948644] [2020-10-29 09:37:55,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:37:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:37:55,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:37:55,819 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-29 09:37:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:58,026 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-29 09:37:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:37:58,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-29 09:37:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:58,028 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:37:58,028 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:37:58,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:37:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:37:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:37:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:37:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-29 09:37:58,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-29 09:37:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:58,038 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-29 09:37:58,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:37:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-29 09:37:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:37:58,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:58,039 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:58,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:37:58,039 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-29 09:37:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:58,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384526114] [2020-10-29 09:37:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:58,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:59,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:59,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:59,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:37:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:59,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:59,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:59,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:59,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:59,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384526114] [2020-10-29 09:37:59,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:59,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:37:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585857278] [2020-10-29 09:37:59,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:37:59,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:37:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:37:59,887 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-29 09:38:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:02,283 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-29 09:38:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:38:02,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-29 09:38:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:02,284 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:38:02,285 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:38:02,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:38:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:38:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:38:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:38:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-29 09:38:02,293 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-29 09:38:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:02,294 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-29 09:38:02,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:38:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-29 09:38:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:38:02,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:02,294 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:02,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:38:02,295 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-29 09:38:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:02,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828063913] [2020-10-29 09:38:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:03,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:03,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:38:03,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:04,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:04,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828063913] [2020-10-29 09:38:04,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:04,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:38:04,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113369531] [2020-10-29 09:38:04,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:38:04,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:04,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:38:04,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:38:04,034 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-29 09:38:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:06,552 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-29 09:38:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:38:06,553 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-29 09:38:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:06,554 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:38:06,554 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:38:06,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:38:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:38:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:38:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:38:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-29 09:38:06,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-29 09:38:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:06,563 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-29 09:38:06,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:38:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-29 09:38:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:38:06,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:06,563 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:06,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:38:06,564 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-29 09:38:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:06,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036380187] [2020-10-29 09:38:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:06,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:38:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:07,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:38:07,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:08,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:08,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:08,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:08,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:08,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:08,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036380187] [2020-10-29 09:38:08,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:08,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:38:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017636998] [2020-10-29 09:38:08,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:38:08,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:38:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:38:08,290 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-29 09:38:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:10,976 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-29 09:38:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:38:10,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-29 09:38:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:10,977 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:38:10,977 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:38:10,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:38:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:38:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 09:38:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:38:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-29 09:38:10,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-29 09:38:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:10,986 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-29 09:38:10,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:38:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-29 09:38:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:38:10,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:10,986 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:10,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:38:10,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-29 09:38:10,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:10,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112903422] [2020-10-29 09:38:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:11,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:38:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:38:11,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:12,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:12,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:12,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112903422] [2020-10-29 09:38:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:12,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:38:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823746133] [2020-10-29 09:38:12,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:38:12,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:38:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:38:12,697 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-29 09:38:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:15,576 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-29 09:38:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:38:15,577 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-29 09:38:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:15,578 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:38:15,578 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:38:15,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:38:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:38:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:38:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:38:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-29 09:38:15,587 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-29 09:38:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:15,587 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-29 09:38:15,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:38:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-29 09:38:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:38:15,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:15,587 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:15,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:38:15,588 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:15,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:15,588 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-29 09:38:15,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:15,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102015361] [2020-10-29 09:38:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:16,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:16,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:38:16,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:16,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-29 09:38:16,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:16,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:38:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:16,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:38:16,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:17,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:17,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:17,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:17,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:17,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:17,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:17,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:17,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:17,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102015361] [2020-10-29 09:38:17,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:17,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:38:17,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710349918] [2020-10-29 09:38:17,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:38:17,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:38:17,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:38:17,705 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-29 09:38:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:20,619 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-29 09:38:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:38:20,620 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-29 09:38:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:20,621 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:38:20,621 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:38:20,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:38:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:38:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:38:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:38:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-29 09:38:20,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-29 09:38:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:20,629 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-29 09:38:20,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:38:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-29 09:38:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:38:20,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:20,630 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:20,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:38:20,630 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-29 09:38:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:20,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711199169] [2020-10-29 09:38:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:20,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:38:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:21,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:38:21,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:22,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:22,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:22,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:22,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:22,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:22,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711199169] [2020-10-29 09:38:22,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:22,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:38:22,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36556478] [2020-10-29 09:38:22,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:38:22,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:38:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:38:22,900 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-29 09:38:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:26,032 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-29 09:38:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:38:26,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-29 09:38:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:26,033 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:38:26,033 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:38:26,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:38:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:38:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:38:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:38:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-29 09:38:26,041 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-29 09:38:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:26,041 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-29 09:38:26,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:38:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-29 09:38:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:38:26,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:26,042 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:26,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:38:26,042 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-29 09:38:26,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:26,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191824573] [2020-10-29 09:38:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:38:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:28,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:28,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:28,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191824573] [2020-10-29 09:38:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:38:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817089081] [2020-10-29 09:38:28,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:38:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:38:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:38:28,514 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-29 09:38:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:31,844 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-29 09:38:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:38:31,845 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-29 09:38:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:31,846 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:38:31,846 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:38:31,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:38:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:38:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:38:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:38:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-29 09:38:31,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-29 09:38:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:31,855 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-29 09:38:31,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:38:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-29 09:38:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:38:31,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:31,856 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:31,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:38:31,857 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-29 09:38:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:31,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257053757] [2020-10-29 09:38:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:31,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:32,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:38:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:34,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:34,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:34,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:34,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257053757] [2020-10-29 09:38:34,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:34,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:38:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268761051] [2020-10-29 09:38:34,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:38:34,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:34,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:38:34,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:38:34,302 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-29 09:38:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:37,844 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-29 09:38:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:38:37,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-29 09:38:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:37,847 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:38:37,847 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:38:37,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:38:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:38:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:38:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:38:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-29 09:38:37,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-29 09:38:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:37,854 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-29 09:38:37,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:38:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-29 09:38:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:38:37,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:37,854 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:37,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:38:37,854 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:37,855 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-29 09:38:37,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:37,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031436420] [2020-10-29 09:38:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:39,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:38:39,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:38:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:40,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:40,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:40,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031436420] [2020-10-29 09:38:40,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:40,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:38:40,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112447248] [2020-10-29 09:38:40,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:38:40,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:40,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:38:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:38:40,666 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-29 09:38:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:44,322 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-29 09:38:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:38:44,323 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-29 09:38:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:44,324 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:38:44,324 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:38:44,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:38:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:38:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:38:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:38:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-29 09:38:44,332 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-29 09:38:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-29 09:38:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:38:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-29 09:38:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:38:44,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:44,333 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:44,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:38:44,334 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-29 09:38:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:44,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812215170] [2020-10-29 09:38:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:45,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:38:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:38:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:47,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:47,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812215170] [2020-10-29 09:38:47,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:47,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:38:47,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90862651] [2020-10-29 09:38:47,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:38:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:38:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:38:47,256 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-29 09:38:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:51,173 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-29 09:38:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:38:51,174 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-29 09:38:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:51,175 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:38:51,175 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:38:51,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:38:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:38:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:38:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:38:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-29 09:38:51,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-29 09:38:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:51,184 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-29 09:38:51,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:38:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-29 09:38:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:38:51,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:51,185 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:51,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:38:51,185 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-29 09:38:51,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:51,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993436256] [2020-10-29 09:38:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:51,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:52,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:38:52,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:53,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:53,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:53,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:53,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:53,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:53,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:53,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:53,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:53,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:38:53,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993436256] [2020-10-29 09:38:53,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:53,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:38:53,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225177154] [2020-10-29 09:38:53,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:38:53,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:38:53,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:38:53,712 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-29 09:38:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:57,787 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-29 09:38:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:38:57,788 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-29 09:38:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:57,789 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:38:57,789 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:38:57,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:38:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:38:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-29 09:38:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:38:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-29 09:38:57,796 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-29 09:38:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:57,796 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-29 09:38:57,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:38:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-29 09:38:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:38:57,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:57,797 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:57,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:38:57,797 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-29 09:38:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:57,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970910315] [2020-10-29 09:38:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:38:58,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:00,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:00,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:00,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970910315] [2020-10-29 09:39:00,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:00,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:39:00,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428634882] [2020-10-29 09:39:00,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:39:00,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:00,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:39:00,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:39:00,458 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-29 09:39:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:04,753 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-29 09:39:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:39:04,754 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-29 09:39:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:04,755 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:39:04,755 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:39:04,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:39:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:39:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:39:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:39:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-29 09:39:04,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-29 09:39:04,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:04,764 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-29 09:39:04,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:39:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-29 09:39:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:39:04,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:04,765 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:04,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:39:04,765 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-29 09:39:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:04,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835675710] [2020-10-29 09:39:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:04,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:39:06,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:08,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:08,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:08,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:08,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:08,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835675710] [2020-10-29 09:39:08,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:08,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:39:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806705548] [2020-10-29 09:39:08,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:39:08,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:08,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:39:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:39:08,121 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-29 09:39:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:12,615 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-29 09:39:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:39:12,616 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-29 09:39:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:12,617 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:39:12,617 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:39:12,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:39:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:39:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:39:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:39:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-29 09:39:12,627 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-29 09:39:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:12,627 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-29 09:39:12,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:39:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-29 09:39:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:39:12,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:12,628 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:12,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:39:12,628 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-29 09:39:12,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:12,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8081485] [2020-10-29 09:39:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:14,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:14,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:39:14,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:14,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-29 09:39:14,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:14,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:39:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:14,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:39:14,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:16,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:16,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:16,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:16,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8081485] [2020-10-29 09:39:16,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:16,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:39:16,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043520649] [2020-10-29 09:39:16,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:39:16,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:39:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:39:16,353 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-29 09:39:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:20,953 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-29 09:39:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:39:20,954 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-29 09:39:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:20,955 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:39:20,955 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:39:20,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:39:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:39:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:39:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:39:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-29 09:39:20,963 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-29 09:39:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:20,964 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-29 09:39:20,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:39:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-29 09:39:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:39:20,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:20,964 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:20,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:39:20,964 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-29 09:39:20,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:20,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457299644] [2020-10-29 09:39:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:20,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:39:22,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:24,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:24,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:24,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:24,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:24,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:24,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:24,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457299644] [2020-10-29 09:39:24,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:24,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:39:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117874363] [2020-10-29 09:39:24,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:39:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:39:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:39:24,088 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-29 09:39:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:28,972 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-29 09:39:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:39:28,972 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-29 09:39:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:28,973 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:39:28,973 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:39:28,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:39:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:39:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-29 09:39:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:39:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-29 09:39:28,979 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-29 09:39:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:28,980 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-29 09:39:28,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:39:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-29 09:39:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:39:28,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:28,980 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:28,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:39:28,980 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-29 09:39:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:28,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530231033] [2020-10-29 09:39:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:29,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2082 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:39:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:33,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:33,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:33,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:33,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:33,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:33,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530231033] [2020-10-29 09:39:33,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:33,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:39:33,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426305834] [2020-10-29 09:39:33,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:39:33,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:39:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:39:33,032 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-29 09:39:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:38,167 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-29 09:39:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:39:38,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-29 09:39:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:38,169 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:39:38,169 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:39:38,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:39:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:39:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:39:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:39:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-29 09:39:38,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-29 09:39:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:38,176 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-29 09:39:38,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:39:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-29 09:39:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:39:38,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:38,177 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:38,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:39:38,177 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-29 09:39:38,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:38,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451819575] [2020-10-29 09:39:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:38,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1892 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:39:40,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:42,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:42,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:42,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:42,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:42,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:42,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:42,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:42,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451819575] [2020-10-29 09:39:42,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:42,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:39:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507753980] [2020-10-29 09:39:42,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:39:42,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:42,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:39:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:39:42,054 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-29 09:39:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:47,315 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-29 09:39:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:39:47,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-29 09:39:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:47,317 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:39:47,317 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:39:47,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:39:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:39:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-29 09:39:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:39:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-29 09:39:47,324 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-29 09:39:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:47,324 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-29 09:39:47,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:39:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-29 09:39:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:39:47,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:47,325 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:47,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:39:47,325 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-29 09:39:47,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:47,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468891162] [2020-10-29 09:39:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2278 [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:49,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:39:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:49,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:39:49,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:51,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:51,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:51,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:51,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468891162] [2020-10-29 09:39:51,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:39:51,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774909000] [2020-10-29 09:39:51,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:39:51,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:39:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:39:51,692 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-29 09:39:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:57,126 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-29 09:39:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:39:57,127 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-29 09:39:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:57,128 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:39:57,128 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:39:57,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:39:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:39:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:39:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:39:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-29 09:39:57,136 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-29 09:39:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:57,136 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-29 09:39:57,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:39:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-29 09:39:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:39:57,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:57,137 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:57,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:39:57,137 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-29 09:39:57,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:57,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879475336] [2020-10-29 09:39:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2023 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:39:59,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:01,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:01,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:01,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879475336] [2020-10-29 09:40:01,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:01,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:40:01,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34274808] [2020-10-29 09:40:01,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:40:01,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:40:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:40:01,443 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-29 09:40:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:07,217 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-29 09:40:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:40:07,218 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-29 09:40:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:07,219 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:40:07,219 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:40:07,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:40:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:40:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:40:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:40:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-29 09:40:07,226 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-29 09:40:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:07,226 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-29 09:40:07,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:40:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-29 09:40:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:40:07,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:07,227 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:07,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:40:07,227 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-29 09:40:07,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:07,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653472824] [2020-10-29 09:40:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:07,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:10,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2751 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:40:10,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:12,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:12,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:12,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:12,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:12,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:12,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:12,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653472824] [2020-10-29 09:40:12,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:12,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:40:12,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722795752] [2020-10-29 09:40:12,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:40:12,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:12,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:40:12,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:40:12,312 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-29 09:40:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:18,326 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-29 09:40:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:40:18,327 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-29 09:40:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:18,327 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:40:18,328 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:40:18,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:40:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:40:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:40:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:40:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-29 09:40:18,335 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-29 09:40:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:18,335 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-29 09:40:18,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:40:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-29 09:40:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:40:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:18,336 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:18,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:40:18,336 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-29 09:40:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:18,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143630591] [2020-10-29 09:40:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:18,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2361 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:40:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:23,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:23,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:23,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:23,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143630591] [2020-10-29 09:40:23,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:23,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:40:23,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323515349] [2020-10-29 09:40:23,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:40:23,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:40:23,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:40:23,111 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-29 09:40:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:29,577 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-29 09:40:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:40:29,578 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-29 09:40:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:29,580 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:40:29,580 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:40:29,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:40:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:40:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 09:40:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:40:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-29 09:40:29,590 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-29 09:40:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:29,590 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-29 09:40:29,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:40:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-29 09:40:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:40:29,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:29,591 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:29,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:40:29,591 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:29,592 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-29 09:40:29,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:29,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040563908] [2020-10-29 09:40:29,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:32,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2733 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:40:32,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:34,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:34,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:34,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:34,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:34,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040563908] [2020-10-29 09:40:34,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:34,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:40:34,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400635851] [2020-10-29 09:40:34,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:40:34,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:40:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:40:34,832 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 51 states. [2020-10-29 09:40:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:41,536 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-29 09:40:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:40:41,537 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-29 09:40:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:41,538 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:40:41,538 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:40:41,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:40:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:40:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:40:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:40:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-29 09:40:41,548 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-29 09:40:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:41,549 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-29 09:40:41,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:40:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-29 09:40:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:40:41,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:41,550 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:41,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:40:41,550 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash -684175657, now seen corresponding path program 48 times [2020-10-29 09:40:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:41,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860802693] [2020-10-29 09:40:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:44,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2992 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:40:44,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:47,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:47,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:47,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:47,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:47,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:40:47,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:47,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:47,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:47,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:47,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:47,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860802693] [2020-10-29 09:40:47,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:47,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 09:40:47,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162748268] [2020-10-29 09:40:47,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 09:40:47,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:47,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 09:40:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:40:47,166 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 52 states. [2020-10-29 09:40:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:53,918 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-29 09:40:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:40:53,918 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-29 09:40:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:53,919 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:40:53,919 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:40:53,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2020-10-29 09:40:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:40:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:40:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:40:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-29 09:40:53,929 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-29 09:40:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:53,930 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-29 09:40:53,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 09:40:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-29 09:40:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:40:53,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:53,930 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:53,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:40:53,931 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:53,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1395679230, now seen corresponding path program 49 times [2020-10-29 09:40:53,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:53,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255104574] [2020-10-29 09:40:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:56,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:56,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:40:56,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:56,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-29 09:40:56,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:56,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:40:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:40:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:58,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:58,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:58,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:58,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:58,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:58,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:40:58,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:58,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:40:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255104574] [2020-10-29 09:40:58,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:58,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:40:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107512879] [2020-10-29 09:40:58,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:40:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:40:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:40:58,815 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 53 states.