/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/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:49:24,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:49:24,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:49:24,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:49:24,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:49:24,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:49:24,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:49:24,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:49:24,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:49:24,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:49:24,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:49:24,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:49:24,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:49:24,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:49:24,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:49:24,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:49:24,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:49:24,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:49:24,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:49:24,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:49:24,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:49:24,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:49:24,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:49:24,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:49:24,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:49:24,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:49:24,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:49:24,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:49:24,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:49:24,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:49:24,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:49:24,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:49:24,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:49:24,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:49:24,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:49:24,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:49:24,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:49:24,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:49:24,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:49:24,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:49:24,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:49:24,301 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 09:49:24,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:49:24,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:49:24,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:49:24,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:49:24,361 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:49:24,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:49:24,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:49:24,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:49:24,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:49:24,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:49:24,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:49:24,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:49:24,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:49:24,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:49:24,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:49:24,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:49:24,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:49:24,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:49:24,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:49:24,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:49:24,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:49:24,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:49:24,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:49:24,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:49:24,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:49:24,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:49:24,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:49:24,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:49:24,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:49:24,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:49:24,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:49:24,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:49:24,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:49:24,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:49:24,798 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:49:24,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-29 09:49:24,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16b7f21ec/beb50bcb06624d2c81482fcd110d9fd6/FLAGe59aa7b11 [2020-10-29 09:49:25,511 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:49:25,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2020-10-29 09:49:25,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16b7f21ec/beb50bcb06624d2c81482fcd110d9fd6/FLAGe59aa7b11 [2020-10-29 09:49:25,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16b7f21ec/beb50bcb06624d2c81482fcd110d9fd6 [2020-10-29 09:49:25,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:49:25,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:49:25,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:49:25,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:49:25,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:49:25,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:49:25" (1/1) ... [2020-10-29 09:49:25,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f76bfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:25, skipping insertion in model container [2020-10-29 09:49:25,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:49:25" (1/1) ... [2020-10-29 09:49:25,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:49:25,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:49:26,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:49:26,169 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:49:26,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:49:26,218 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:49:26,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26 WrapperNode [2020-10-29 09:49:26,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:49:26,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:49:26,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:49:26,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:49:26,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (1/1) ... [2020-10-29 09:49:26,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:49:26,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:49:26,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:49:26,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:49:26,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (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 09:49:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:49:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:49:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:49:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:49:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:49:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:49:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:49:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:49:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:49:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:49:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:49:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:49:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:49:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:49:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:49:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:49:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:49:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:49:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:49:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:49:26,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:49:26,965 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:49:26,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:49:26 BoogieIcfgContainer [2020-10-29 09:49:26,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:49:26,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:49:26,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:49:26,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:49:26,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:49:25" (1/3) ... [2020-10-29 09:49:26,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656353c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:49:26, skipping insertion in model container [2020-10-29 09:49:26,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:49:26" (2/3) ... [2020-10-29 09:49:26,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656353c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:49:26, skipping insertion in model container [2020-10-29 09:49:26,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:49:26" (3/3) ... [2020-10-29 09:49:26,981 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2020-10-29 09:49:27,024 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:49:27,039 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:49:27,081 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:49:27,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:49:27,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:49:27,123 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:49:27,124 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:49:27,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:49:27,124 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:49:27,124 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:49:27,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:49:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 09:49:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:49:27,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:27,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:27,158 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1500402365, now seen corresponding path program 1 times [2020-10-29 09:49:27,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:27,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326129351] [2020-10-29 09:49:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:28,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:28,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:49:28,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:28,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-29 09:49:28,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:28,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:28,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:49:28,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:28,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:49:28,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:49:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:28,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:28,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:28,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:28,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:28,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:49:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:28,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:28,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:28,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:28,329 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 09:49:28,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326129351] [2020-10-29 09:49:28,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:49:28,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:49:28,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871525973] [2020-10-29 09:49:28,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:49:28,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:49:28,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:49:28,357 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-10-29 09:49:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:28,818 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-10-29 09:49:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:49:28,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:49:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:28,829 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:49:28,829 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:49:28,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:49:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:49:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:49:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-29 09:49:28,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-29 09:49:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:28,877 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-29 09:49:28,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:49:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-29 09:49:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:49:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:28,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:28,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:49:28,879 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:28,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:28,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1217035893, now seen corresponding path program 1 times [2020-10-29 09:49:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:28,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062144008] [2020-10-29 09:49:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:28,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:28,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:29,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:29,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:49:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:29,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:49:29,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:29,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:29,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:29,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:29,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:29,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:49:29,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:29,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:29,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:29,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:29,360 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 09:49:29,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062144008] [2020-10-29 09:49:29,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:29,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:49:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116817703] [2020-10-29 09:49:29,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:49:29,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:49:29,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:49:29,365 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-10-29 09:49:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:29,764 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-29 09:49:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:49:29,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:49:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:29,767 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:49:29,767 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:49:29,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:49:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-29 09:49:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:49:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-29 09:49:29,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-29 09:49:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:29,777 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-29 09:49:29,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:49:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-29 09:49:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:49:29,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:29,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:29,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:49:29,779 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 142743556, now seen corresponding path program 1 times [2020-10-29 09:49:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:29,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120278027] [2020-10-29 09:49:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:29,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:30,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:49:30,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:30,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 09:49:30,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:30,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:49:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:49:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:49:30,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:30,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:30,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:30,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:30,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:30,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:30,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:30,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:30,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:30,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120278027] [2020-10-29 09:49:30,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:30,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:49:30,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878024590] [2020-10-29 09:49:30,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:49:30,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:30,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:49:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:49:30,283 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-29 09:49:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:30,546 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-29 09:49:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:49:30,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:49:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:30,548 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:49:30,548 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:49:30,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:49:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:49:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:49:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:49:30,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2020-10-29 09:49:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:30,556 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:49:30,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:49:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:49:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:49:30,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:30,557 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:30,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:49:30,557 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash -441724029, now seen corresponding path program 2 times [2020-10-29 09:49:30,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:30,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976597433] [2020-10-29 09:49:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:30,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:30,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:30,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:49:30,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:30,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-29 09:49:30,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:30,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:49:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:49:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:31,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:31,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:31,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:31,062 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 09:49:31,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976597433] [2020-10-29 09:49:31,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:31,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:49:31,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777869023] [2020-10-29 09:49:31,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:49:31,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:49:31,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:49:31,073 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-29 09:49:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:31,437 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-29 09:49:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:49:31,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-29 09:49:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:31,439 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:49:31,439 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:49:31,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:49:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:49:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:49:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-29 09:49:31,446 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-29 09:49:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:31,446 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-29 09:49:31,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:49:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-29 09:49:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:49:31,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:31,447 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:31,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:49:31,447 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:31,448 INFO L82 PathProgramCache]: Analyzing trace with hash -323674059, now seen corresponding path program 3 times [2020-10-29 09:49:31,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:31,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240062070] [2020-10-29 09:49:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:31,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:49:31,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:31,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-29 09:49:31,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:49:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:31,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:31,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,965 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 09:49:31,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240062070] [2020-10-29 09:49:31,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:31,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:49:31,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333781127] [2020-10-29 09:49:31,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:49:31,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:49:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:49:31,968 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-29 09:49:32,370 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-10-29 09:49:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:32,602 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-29 09:49:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:49:32,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-29 09:49:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:32,605 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:49:32,605 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:49:32,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:49:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:49:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:49:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-29 09:49:32,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-29 09:49:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:32,612 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-29 09:49:32,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:49:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-29 09:49:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:49:32,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:32,613 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:32,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:49:32,614 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:32,614 INFO L82 PathProgramCache]: Analyzing trace with hash -959092285, now seen corresponding path program 4 times [2020-10-29 09:49:32,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:32,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901341544] [2020-10-29 09:49:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:32,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:32,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:32,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:49:32,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:32,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-29 09:49:32,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:32,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:49:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:32,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:49:32,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:33,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:33,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:33,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:33,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:33,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:33,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:33,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:33,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:33,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:33,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:33,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:33,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:33,134 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 09:49:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901341544] [2020-10-29 09:49:33,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:33,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:49:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031319130] [2020-10-29 09:49:33,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:49:33,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:49:33,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:49:33,139 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-29 09:49:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:33,638 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-29 09:49:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:49:33,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-29 09:49:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:33,640 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:49:33,640 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:49:33,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:49:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:49:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:49:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:49:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-29 09:49:33,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-29 09:49:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:33,648 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-29 09:49:33,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:49:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-29 09:49:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:49:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:33,650 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:33,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:49:33,650 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 817779189, now seen corresponding path program 5 times [2020-10-29 09:49:33,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:33,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068139652] [2020-10-29 09:49:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:33,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:33,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:33,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:49:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:49:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:34,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:34,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:34,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:34,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:34,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:34,143 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 09:49:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068139652] [2020-10-29 09:49:34,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:34,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:49:34,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584455104] [2020-10-29 09:49:34,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:49:34,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:49:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:49:34,147 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-29 09:49:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:34,734 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-29 09:49:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:49:34,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-29 09:49:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:34,735 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:49:34,736 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:49:34,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:49:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:49:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:49:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-29 09:49:34,746 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-29 09:49:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:34,747 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-29 09:49:34,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:49:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-29 09:49:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:49:34,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:34,748 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:34,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:49:34,748 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:34,749 INFO L82 PathProgramCache]: Analyzing trace with hash 66220035, now seen corresponding path program 6 times [2020-10-29 09:49:34,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:34,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342466084] [2020-10-29 09:49:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:34,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:35,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:35,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:49:35,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-29 09:49:35,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:35,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:49:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:35,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:49:35,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:35,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:35,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:35,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:35,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:35,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:35,354 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 09:49:35,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342466084] [2020-10-29 09:49:35,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:35,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:49:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983111466] [2020-10-29 09:49:35,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:49:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:49:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:35,358 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-29 09:49:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:36,000 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-29 09:49:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:49:36,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-29 09:49:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:36,001 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:49:36,001 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:49:36,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:49:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:49:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:49:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:49:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-29 09:49:36,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-29 09:49:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:36,016 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-29 09:49:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:49:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-29 09:49:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:49:36,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:36,017 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:36,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:49:36,017 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1757277259, now seen corresponding path program 7 times [2020-10-29 09:49:36,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:36,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563824090] [2020-10-29 09:49:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:36,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:36,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:49:36,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:36,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-29 09:49:36,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:36,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:49:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:36,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:49:36,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:36,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:36,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:36,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:36,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:36,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:36,738 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 09:49:36,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563824090] [2020-10-29 09:49:36,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:36,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:49:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312644238] [2020-10-29 09:49:36,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:49:36,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:49:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:49:36,741 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-29 09:49:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:37,451 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-29 09:49:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:49:37,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-29 09:49:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:37,452 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:49:37,452 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:49:37,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:49:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:49:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:49:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:49:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-29 09:49:37,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-29 09:49:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:37,465 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-29 09:49:37,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:49:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-29 09:49:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:49:37,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:37,470 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:37,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:49:37,471 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1843848771, now seen corresponding path program 8 times [2020-10-29 09:49:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592029089] [2020-10-29 09:49:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:37,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:37,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:49:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:49:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:38,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:38,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:38,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:38,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:38,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:38,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:38,229 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 09:49:38,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592029089] [2020-10-29 09:49:38,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:38,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:49:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228829459] [2020-10-29 09:49:38,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:49:38,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:49:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:49:38,232 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2020-10-29 09:49:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:38,780 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-29 09:49:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:49:38,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-29 09:49:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:38,782 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:49:38,782 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:49:38,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:49:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:49:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:49:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-29 09:49:38,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-29 09:49:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:38,793 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-29 09:49:38,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:49:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-29 09:49:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:49:38,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:38,794 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:38,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:49:38,795 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1809606005, now seen corresponding path program 9 times [2020-10-29 09:49:38,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:38,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630750358] [2020-10-29 09:49:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:38,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:39,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:39,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:49:39,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:49:39,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:39,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:39,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:39,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 09:49:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:39,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:39,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,580 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 09:49:39,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630750358] [2020-10-29 09:49:39,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:39,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:49:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633971157] [2020-10-29 09:49:39,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:49:39,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:49:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:49:39,586 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-10-29 09:49:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:40,303 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-29 09:49:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:49:40,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-29 09:49:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:40,304 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:49:40,305 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:49:40,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:49:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:49:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:49:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:49:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-29 09:49:40,315 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-29 09:49:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:40,315 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-29 09:49:40,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:49:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-29 09:49:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:49:40,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:40,321 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:40,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:49:40,321 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash 748080259, now seen corresponding path program 10 times [2020-10-29 09:49:40,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:40,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440313054] [2020-10-29 09:49:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:40,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:40,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:40,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:49:40,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:40,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:49:40,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:41,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:41,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:41,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:41,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:41,177 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 09:49:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440313054] [2020-10-29 09:49:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:49:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759700043] [2020-10-29 09:49:41,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:49:41,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:49:41,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:49:41,180 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 14 states. [2020-10-29 09:49:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:41,946 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-29 09:49:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:49:41,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-29 09:49:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:41,948 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:49:41,948 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:49:41,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:49:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:49:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:49:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:49:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-29 09:49:41,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-29 09:49:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:41,959 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-29 09:49:41,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:49:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-29 09:49:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:49:41,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:41,962 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:41,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:49:41,963 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:41,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:41,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2094446795, now seen corresponding path program 11 times [2020-10-29 09:49:41,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:41,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310202782] [2020-10-29 09:49:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:42,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:49:42,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:42,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-29 09:49:42,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:42,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:49:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:42,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:49:42,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:42,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:42,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:42,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:42,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:49:42,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:42,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:42,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:42,882 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 09:49:42,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310202782] [2020-10-29 09:49:42,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:42,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:49:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692312221] [2020-10-29 09:49:42,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:49:42,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:42,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:49:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:49:42,888 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-10-29 09:49:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:43,664 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-29 09:49:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:49:43,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-29 09:49:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:43,665 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:49:43,665 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:49:43,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:49:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:49:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:49:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:49:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-29 09:49:43,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-29 09:49:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:43,673 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-29 09:49:43,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:49:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-29 09:49:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:49:43,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:43,674 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:43,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:49:43,675 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash -18472253, now seen corresponding path program 12 times [2020-10-29 09:49:43,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:43,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370467488] [2020-10-29 09:49:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:43,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:44,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:44,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:49:44,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:44,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:49:44,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:44,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:44,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:44,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:44,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:44,642 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 09:49:44,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370467488] [2020-10-29 09:49:44,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:44,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:49:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307025097] [2020-10-29 09:49:44,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:49:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:49:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:49:44,646 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 16 states. [2020-10-29 09:49:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:45,506 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-29 09:49:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:49:45,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-29 09:49:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:45,507 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:49:45,507 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:49:45,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:49:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:49:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:49:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:49:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-29 09:49:45,516 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-29 09:49:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:45,516 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-29 09:49:45,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:49:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-29 09:49:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:49:45,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:45,517 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:45,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:49:45,517 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -87770891, now seen corresponding path program 13 times [2020-10-29 09:49:45,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:45,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206524973] [2020-10-29 09:49:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:45,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:46,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:49:46,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:46,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 754 [2020-10-29 09:49:46,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:46,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:49:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:46,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:49:46,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:46,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:46,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:46,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:46,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:46,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:46,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:46,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:46,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:46,712 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 09:49:46,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206524973] [2020-10-29 09:49:46,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:46,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:49:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981710656] [2020-10-29 09:49:46,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:49:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:49:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:49:46,715 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 17 states. [2020-10-29 09:49:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:47,704 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-29 09:49:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:49:47,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-29 09:49:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:47,706 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:49:47,706 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:49:47,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:49:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:49:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-29 09:49:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:49:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-29 09:49:47,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-29 09:49:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:47,714 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-29 09:49:47,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:49:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-29 09:49:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:49:47,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:47,715 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:47,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:49:47,716 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:47,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2058938627, now seen corresponding path program 14 times [2020-10-29 09:49:47,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:47,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953757835] [2020-10-29 09:49:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:49:48,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-29 09:49:48,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:49:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:49:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:48,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:48,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:49:48,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:48,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:48,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:49:48,802 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 09:49:48,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953757835] [2020-10-29 09:49:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:48,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:49:48,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538985401] [2020-10-29 09:49:48,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:49:48,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:48,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:49:48,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:49:48,805 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 18 states. [2020-10-29 09:49:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:49,908 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-29 09:49:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:49:49,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-29 09:49:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:49,911 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:49:49,911 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:49:49,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:49:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:49:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:49:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:49:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-29 09:49:49,920 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-29 09:49:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:49,921 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-29 09:49:49,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:49:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-29 09:49:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:49,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:49,922 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:49,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:49:49,922 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -112543051, now seen corresponding path program 15 times [2020-10-29 09:49:49,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:49,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267031102] [2020-10-29 09:49:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:49,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:50,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:49:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:51,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:51,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:51,034 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 09:49:51,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267031102] [2020-10-29 09:49:51,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:51,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:49:51,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137848160] [2020-10-29 09:49:51,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:49:51,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:49:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:49:51,037 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 19 states. [2020-10-29 09:49:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:52,268 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-29 09:49:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:49:52,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-29 09:49:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:52,270 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:49:52,270 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:49:52,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:49:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:49:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-29 09:49:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:49:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-29 09:49:52,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-29 09:49:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:52,284 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-29 09:49:52,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:49:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-29 09:49:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:52,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:52,287 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:52,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:49:52,287 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1291001667, now seen corresponding path program 16 times [2020-10-29 09:49:52,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:52,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498025009] [2020-10-29 09:49:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:52,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:52,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:52,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:52,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:52,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-29 09:49:52,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:52,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:49:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:52,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:52,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:53,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:53,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:53,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:53,275 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 09:49:53,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498025009] [2020-10-29 09:49:53,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:53,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:49:53,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413586043] [2020-10-29 09:49:53,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:49:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:49:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:49:53,278 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 20 states. [2020-10-29 09:49:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:54,582 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-29 09:49:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:49:54,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-29 09:49:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:54,584 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:49:54,584 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:49:54,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:49:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:49:54,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:49:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:49:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-29 09:49:54,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-29 09:49:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:54,593 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-29 09:49:54,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:49:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-29 09:49:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:49:54,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:54,594 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:54,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:49:54,595 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1851214965, now seen corresponding path program 17 times [2020-10-29 09:49:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:54,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322522302] [2020-10-29 09:49:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:55,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:55,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:55,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:55,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:55,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:55,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:55,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:55,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:55,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:55,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:55,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:55,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:55,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:55,900 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 09:49:55,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322522302] [2020-10-29 09:49:55,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:55,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566739900] [2020-10-29 09:49:55,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:55,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:55,903 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 21 states. [2020-10-29 09:49:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:57,288 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-29 09:49:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:49:57,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-29 09:49:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:57,294 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:49:57,294 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:49:57,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:49:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:49:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:49:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:49:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-29 09:49:57,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-29 09:49:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:57,303 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-29 09:49:57,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-29 09:49:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:49:57,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:57,304 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:57,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:49:57,304 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:57,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2037958019, now seen corresponding path program 18 times [2020-10-29 09:49:57,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:57,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312222758] [2020-10-29 09:49:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:57,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:57,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:49:57,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:49:57,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:58,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:58,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:58,541 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 09:49:58,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312222758] [2020-10-29 09:49:58,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:58,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:49:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852007972] [2020-10-29 09:49:58,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:49:58,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:49:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:49:58,543 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 22 states. [2020-10-29 09:50:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:00,072 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-29 09:50:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:50:00,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-29 09:50:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:00,074 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:50:00,074 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:50:00,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:50:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:50:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:50:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:50:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-29 09:50:00,089 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-29 09:50:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:00,089 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-29 09:50:00,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-29 09:50:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:00,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:00,091 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:00,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:50:00,092 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash -762941899, now seen corresponding path program 19 times [2020-10-29 09:50:00,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:00,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369404164] [2020-10-29 09:50:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:00,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:00,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:00,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:00,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:50:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:01,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:01,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:01,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:01,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:01,436 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 09:50:01,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369404164] [2020-10-29 09:50:01,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:01,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:50:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606753491] [2020-10-29 09:50:01,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:50:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:50:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:01,439 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 23 states. [2020-10-29 09:50:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:03,044 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-29 09:50:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:50:03,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-29 09:50:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:03,045 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:50:03,046 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:50:03,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:50:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:50:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:50:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:50:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-29 09:50:03,054 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-29 09:50:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:03,054 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-29 09:50:03,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:50:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-29 09:50:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:50:03,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:03,055 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:03,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:50:03,055 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1691493437, now seen corresponding path program 20 times [2020-10-29 09:50:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:03,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904122191] [2020-10-29 09:50:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:03,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:03,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:04,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1036 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:04,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:50:04,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:04,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:04,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:04,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:04,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:04,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:04,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:04,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:04,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:04,733 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 09:50:04,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904122191] [2020-10-29 09:50:04,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:04,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:50:04,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538848287] [2020-10-29 09:50:04,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:50:04,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:04,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:50:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:50:04,736 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 24 states. [2020-10-29 09:50:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:06,459 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-29 09:50:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:50:06,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-29 09:50:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:06,463 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:50:06,463 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:50:06,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:50:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:50:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:50:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:50:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-29 09:50:06,473 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-29 09:50:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:06,473 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-29 09:50:06,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:50:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-29 09:50:06,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:06,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:06,474 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:06,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:50:06,474 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash -411820043, now seen corresponding path program 21 times [2020-10-29 09:50:06,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:06,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956131599] [2020-10-29 09:50:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:06,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:07,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:07,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-29 09:50:07,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:50:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:07,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:50:07,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:07,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:07,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:07,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:07,815 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 09:50:07,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956131599] [2020-10-29 09:50:07,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:07,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:50:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507243577] [2020-10-29 09:50:07,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:50:07,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:50:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:50:07,817 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 25 states. [2020-10-29 09:50:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:09,686 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-29 09:50:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:50:09,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-29 09:50:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:09,689 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:50:09,689 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:50:09,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:50:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:50:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 09:50:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:50:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-29 09:50:09,698 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-29 09:50:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:09,698 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-29 09:50:09,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:50:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-29 09:50:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:50:09,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:09,699 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:09,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:50:09,700 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 603349507, now seen corresponding path program 22 times [2020-10-29 09:50:09,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:09,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095238108] [2020-10-29 09:50:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:10,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:50:10,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1078 [2020-10-29 09:50:10,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:10,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:50:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:10,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:50:10,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:11,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:11,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:11,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:11,483 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 09:50:11,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095238108] [2020-10-29 09:50:11,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:11,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:50:11,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290363789] [2020-10-29 09:50:11,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:50:11,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:11,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:50:11,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:50:11,485 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 26 states. [2020-10-29 09:50:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:13,453 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-29 09:50:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:50:13,454 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-29 09:50:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:13,455 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:50:13,455 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:50:13,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:50:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:50:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:50:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:50:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-29 09:50:13,464 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-29 09:50:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:13,465 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-29 09:50:13,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:50:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-29 09:50:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:50:13,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:13,466 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:13,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:50:13,466 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2008834485, now seen corresponding path program 23 times [2020-10-29 09:50:13,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:13,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236899107] [2020-10-29 09:50:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:13,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:50:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:14,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:50:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:15,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:15,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:15,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:15,011 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 09:50:15,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236899107] [2020-10-29 09:50:15,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:15,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:50:15,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211380328] [2020-10-29 09:50:15,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:50:15,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:15,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:50:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:50:15,013 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 27 states. [2020-10-29 09:50:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:17,082 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-29 09:50:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:50:17,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-29 09:50:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:17,084 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:50:17,084 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:50:17,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:50:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:50:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:50:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:50:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-29 09:50:17,094 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-29 09:50:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:17,094 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-29 09:50:17,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:50:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-29 09:50:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:50:17,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:17,095 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:17,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:50:17,095 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1665771453, now seen corresponding path program 24 times [2020-10-29 09:50:17,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:17,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337100359] [2020-10-29 09:50:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:17,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:18,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:18,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:50:18,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:18,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:50:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:18,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:19,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:19,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:19,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:19,006 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 09:50:19,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337100359] [2020-10-29 09:50:19,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:19,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:50:19,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795778802] [2020-10-29 09:50:19,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:50:19,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:50:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:50:19,008 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 28 states. [2020-10-29 09:50:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:21,127 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-29 09:50:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:50:21,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-29 09:50:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:21,129 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:50:21,129 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:50:21,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:50:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:50:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:50:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:50:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-29 09:50:21,138 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-29 09:50:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:21,139 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-29 09:50:21,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:50:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-29 09:50:21,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:50:21,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:21,139 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:21,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:50:21,140 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash 385561461, now seen corresponding path program 25 times [2020-10-29 09:50:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:21,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482301024] [2020-10-29 09:50:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:21,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:22,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:50:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:23,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:23,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:23,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:23,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:23,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:23,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:23,057 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 09:50:23,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482301024] [2020-10-29 09:50:23,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:23,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:50:23,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798280254] [2020-10-29 09:50:23,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:50:23,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:50:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:50:23,061 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 29 states. [2020-10-29 09:50:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:25,322 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-29 09:50:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:50:25,323 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-29 09:50:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:25,324 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:50:25,324 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:50:25,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:50:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:50:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 09:50:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:50:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-29 09:50:25,333 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-29 09:50:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:25,333 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-29 09:50:25,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:50:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-29 09:50:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:50:25,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:25,334 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:25,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:50:25,334 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash -447627645, now seen corresponding path program 26 times [2020-10-29 09:50:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:25,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577663888] [2020-10-29 09:50:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:50:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:27,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:27,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:27,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:27,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:27,237 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 09:50:27,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577663888] [2020-10-29 09:50:27,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:27,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:50:27,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94663898] [2020-10-29 09:50:27,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:50:27,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:50:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:50:27,239 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 30 states. [2020-10-29 09:50:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:29,673 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-29 09:50:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:50:29,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-29 09:50:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:29,674 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:50:29,674 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:50:29,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:50:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:50:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:50:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:50:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-29 09:50:29,684 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-29 09:50:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:29,684 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-29 09:50:29,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:50:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-29 09:50:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:50:29,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:29,685 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:29,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:50:29,686 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash -506686155, now seen corresponding path program 27 times [2020-10-29 09:50:29,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:29,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726112657] [2020-10-29 09:50:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:29,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:30,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:50:30,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:30,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-29 09:50:30,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:30,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:50:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:30,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:50:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:31,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:31,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:31,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:31,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:31,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:31,818 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 09:50:31,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726112657] [2020-10-29 09:50:31,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:31,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:50:31,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930613601] [2020-10-29 09:50:31,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:50:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:50:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:50:31,820 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 31 states. [2020-10-29 09:50:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:34,384 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-29 09:50:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:50:34,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-29 09:50:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:34,385 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:50:34,385 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:50:34,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:50:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:50:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:50:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:50:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-29 09:50:34,393 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-29 09:50:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:34,393 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-29 09:50:34,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:50:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-29 09:50:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:50:34,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:34,394 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:34,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:50:34,394 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1957467331, now seen corresponding path program 28 times [2020-10-29 09:50:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:34,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548313994] [2020-10-29 09:50:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1254 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:50:35,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:36,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:36,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:36,675 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 09:50:36,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548313994] [2020-10-29 09:50:36,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:36,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:50:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874416546] [2020-10-29 09:50:36,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:50:36,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:50:36,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:50:36,677 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 32 states. [2020-10-29 09:50:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:39,339 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-29 09:50:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:50:39,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-29 09:50:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:39,341 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:50:39,341 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:50:39,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:50:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:50:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:50:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:50:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-29 09:50:39,352 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-29 09:50:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:39,353 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-29 09:50:39,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:50:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-29 09:50:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:50:39,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:39,354 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:39,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:50:39,354 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:39,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1036814069, now seen corresponding path program 29 times [2020-10-29 09:50:39,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:39,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295707873] [2020-10-29 09:50:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:50:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:40,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:50:40,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:41,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:41,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:41,408 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 09:50:41,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295707873] [2020-10-29 09:50:41,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:41,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:50:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991241192] [2020-10-29 09:50:41,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:50:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:50:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:50:41,410 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 33 states. [2020-10-29 09:50:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:44,339 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-29 09:50:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:50:44,340 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-29 09:50:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:44,341 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:50:44,341 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:50:44,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:50:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:50:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:50:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:50:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-29 09:50:44,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-29 09:50:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:44,349 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-29 09:50:44,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:50:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-29 09:50:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:50:44,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:44,350 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:44,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:50:44,350 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1733633277, now seen corresponding path program 30 times [2020-10-29 09:50:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:44,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916347758] [2020-10-29 09:50:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1482 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:50:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:46,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:46,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:46,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:46,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:46,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:46,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:46,996 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 09:50:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916347758] [2020-10-29 09:50:46,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:50:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802027613] [2020-10-29 09:50:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:50:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:50:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:50:46,999 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 34 states. [2020-10-29 09:50:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:50,070 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-29 09:50:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:50:50,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-29 09:50:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:50,072 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:50:50,072 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:50:50,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:50:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:50:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:50:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:50:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-29 09:50:50,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-29 09:50:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:50,083 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-29 09:50:50,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:50:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-29 09:50:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:50:50,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:50,084 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:50,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:50:50,084 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1718155083, now seen corresponding path program 31 times [2020-10-29 09:50:50,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:50,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770279367] [2020-10-29 09:50:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:50,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:50,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:50,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:50,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:50:50,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:50,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-29 09:50:50,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:50,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:50:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:50,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:50:50,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:52,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:52,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:52,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:52,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:52,261 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 09:50:52,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770279367] [2020-10-29 09:50:52,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:52,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:50:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848482334] [2020-10-29 09:50:52,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:50:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:50:52,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:50:52,263 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 35 states. [2020-10-29 09:50:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:55,469 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-29 09:50:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:50:55,470 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-29 09:50:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:55,471 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:50:55,471 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:50:55,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:50:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:50:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:50:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:50:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-29 09:50:55,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-29 09:50:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:55,481 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-29 09:50:55,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:50:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-29 09:50:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:50:55,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:55,481 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:55,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:50:55,482 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1238331069, now seen corresponding path program 32 times [2020-10-29 09:50:55,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:55,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845008548] [2020-10-29 09:50:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:50:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:57,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:57,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:57,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:57,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:57,986 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 09:50:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845008548] [2020-10-29 09:50:57,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:57,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:50:57,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495818409] [2020-10-29 09:50:57,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:50:57,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:50:57,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:50:57,994 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 36 states. [2020-10-29 09:51:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:01,371 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-29 09:51:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:51:01,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-29 09:51:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:01,373 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:51:01,373 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:51:01,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:51:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:51:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:51:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:51:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-29 09:51:01,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-29 09:51:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:01,381 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-29 09:51:01,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:51:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-29 09:51:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:51:01,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:01,381 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:01,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:51:01,382 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 751311477, now seen corresponding path program 33 times [2020-10-29 09:51:01,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:01,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422203721] [2020-10-29 09:51:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:01,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:02,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1303 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:51:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:03,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:03,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:03,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:03,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:03,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,985 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 09:51:03,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422203721] [2020-10-29 09:51:03,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:03,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:51:03,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612172152] [2020-10-29 09:51:03,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:51:03,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:03,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:51:03,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:51:03,987 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 37 states. [2020-10-29 09:51:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:07,566 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-29 09:51:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:51:07,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-29 09:51:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:07,567 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:51:07,567 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:51:07,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:51:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:51:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-29 09:51:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:51:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-29 09:51:07,574 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-29 09:51:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:07,575 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-29 09:51:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:51:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-29 09:51:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:51:07,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:07,576 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:07,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:51:07,576 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1994279037, now seen corresponding path program 34 times [2020-10-29 09:51:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:07,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600991323] [2020-10-29 09:51:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:07,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1323 [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:51:08,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:08,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:51:08,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:10,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:10,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:10,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:10,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:10,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:51:10,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:10,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:10,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:10,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:10,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:10,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:10,234 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 09:51:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600991323] [2020-10-29 09:51:10,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:10,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:51:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514690621] [2020-10-29 09:51:10,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:51:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:51:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:51:10,236 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 38 states. [2020-10-29 09:51:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:13,968 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-29 09:51:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:51:13,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-29 09:51:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:13,970 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:51:13,970 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:51:13,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:51:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:51:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:51:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:51:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-29 09:51:13,979 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-29 09:51:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:13,979 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-29 09:51:13,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:51:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-29 09:51:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:51:13,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:13,980 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:13,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:51:13,980 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1208239051, now seen corresponding path program 35 times [2020-10-29 09:51:13,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:13,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509583909] [2020-10-29 09:51:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:14,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:51:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:16,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:16,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:16,365 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 09:51:16,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509583909] [2020-10-29 09:51:16,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:16,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:51:16,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785579318] [2020-10-29 09:51:16,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:51:16,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:51:16,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:51:16,367 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 39 states. [2020-10-29 09:51:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:20,216 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-29 09:51:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:51:20,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-29 09:51:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:20,218 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:51:20,218 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:51:20,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:51:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:51:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:51:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:51:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-29 09:51:20,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-29 09:51:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:20,227 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-29 09:51:20,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:51:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-29 09:51:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:51:20,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:20,228 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:20,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:51:20,228 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1684164035, now seen corresponding path program 36 times [2020-10-29 09:51:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:20,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621540369] [2020-10-29 09:51:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:21,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:51:21,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-29 09:51:21,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:21,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:51:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:21,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:51:21,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:22,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:22,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:22,730 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 09:51:22,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621540369] [2020-10-29 09:51:22,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:22,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:51:22,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829890634] [2020-10-29 09:51:22,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:51:22,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:51:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:51:22,732 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 40 states. [2020-10-29 09:51:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:26,760 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-29 09:51:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:51:26,761 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-29 09:51:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:26,762 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:51:26,762 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:51:26,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:51:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:51:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:51:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:51:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-29 09:51:26,772 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-29 09:51:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:26,772 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-29 09:51:26,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:51:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-29 09:51:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:51:26,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:26,773 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:26,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:51:26,773 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1154346485, now seen corresponding path program 37 times [2020-10-29 09:51:26,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:26,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627409147] [2020-10-29 09:51:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:26,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:51:28,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:28,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:51:28,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:29,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:29,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:29,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:29,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:29,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:29,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:29,633 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 09:51:29,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627409147] [2020-10-29 09:51:29,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:29,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:51:29,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428157695] [2020-10-29 09:51:29,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:51:29,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:29,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:51:29,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:51:29,634 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 41 states. [2020-10-29 09:51:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:33,829 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-29 09:51:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:51:33,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-29 09:51:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:33,831 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:51:33,831 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:51:33,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:51:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:51:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-29 09:51:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:51:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-29 09:51:33,839 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-29 09:51:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:33,840 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-29 09:51:33,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:51:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-29 09:51:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:51:33,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:33,840 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:33,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:51:33,840 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1909871619, now seen corresponding path program 38 times [2020-10-29 09:51:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:33,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885512901] [2020-10-29 09:51:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:36,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:36,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:51:36,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2157 [2020-10-29 09:51:36,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:36,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:51:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:51:36,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:37,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:37,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:37,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:37,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:37,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:37,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:37,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:37,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:37,693 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 09:51:37,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885512901] [2020-10-29 09:51:37,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:51:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154271551] [2020-10-29 09:51:37,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:51:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:51:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:51:37,694 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 42 states. [2020-10-29 09:51:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:42,064 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-29 09:51:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:51:42,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-29 09:51:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:42,066 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:51:42,066 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:51:42,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:51:42,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:51:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:51:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:51:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-29 09:51:42,076 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-29 09:51:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:42,076 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-29 09:51:42,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:51:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-29 09:51:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:51:42,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:42,077 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:42,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:51:42,077 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -438653003, now seen corresponding path program 39 times [2020-10-29 09:51:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399603929] [2020-10-29 09:51:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:43,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:51:43,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:45,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:45,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:45,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:45,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:45,204 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 09:51:45,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399603929] [2020-10-29 09:51:45,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:45,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:51:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035739911] [2020-10-29 09:51:45,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:51:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:51:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:51:45,206 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 43 states. [2020-10-29 09:51:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:49,841 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-29 09:51:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:51:49,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 54 [2020-10-29 09:51:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:49,842 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:51:49,842 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:51:49,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:51:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:51:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-29 09:51:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:51:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-29 09:51:49,853 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-29 09:51:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:49,854 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-29 09:51:49,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:51:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-29 09:51:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:51:49,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:49,854 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:49,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:51:49,855 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash -228472253, now seen corresponding path program 40 times [2020-10-29 09:51:49,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:49,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435271211] [2020-10-29 09:51:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:50,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:51,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:51,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:51:51,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:51:51,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:53,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:53,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:53,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:53,368 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 09:51:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435271211] [2020-10-29 09:51:53,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:53,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:51:53,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584298448] [2020-10-29 09:51:53,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:51:53,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:53,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:51:53,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:51:53,371 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 44 states. [2020-10-29 09:51:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:58,197 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-29 09:51:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:51:58,198 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-29 09:51:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:58,199 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:51:58,199 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:51:58,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:51:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:51:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:51:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:51:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-29 09:51:58,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-29 09:51:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:58,210 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-29 09:51:58,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:51:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-29 09:51:58,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:51:58,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:58,211 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:58,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:51:58,211 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:58,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1992163701, now seen corresponding path program 41 times [2020-10-29 09:51:58,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:58,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444554833] [2020-10-29 09:51:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:59,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:51:59,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:01,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:01,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:01,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:01,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:01,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:01,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:01,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:01,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:01,522 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 09:52:01,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444554833] [2020-10-29 09:52:01,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:01,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:52:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440556244] [2020-10-29 09:52:01,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:52:01,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:52:01,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:52:01,525 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 45 states. [2020-10-29 09:52:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:06,689 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-29 09:52:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:52:06,690 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-29 09:52:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:06,691 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:52:06,691 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:52:06,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:52:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:52:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:52:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:52:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-29 09:52:06,700 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-29 09:52:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:06,701 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-29 09:52:06,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:52:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-29 09:52:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:52:06,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:06,701 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:06,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:52:06,702 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2112401539, now seen corresponding path program 42 times [2020-10-29 09:52:06,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:06,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829305058] [2020-10-29 09:52:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:06,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:07,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:52:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1483 [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:52:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:10,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:10,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:10,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:10,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:10,171 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 09:52:10,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829305058] [2020-10-29 09:52:10,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:10,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:52:10,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628917479] [2020-10-29 09:52:10,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:52:10,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:52:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:52:10,173 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 46 states. [2020-10-29 09:52:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:15,593 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-29 09:52:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:52:15,594 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-29 09:52:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:15,595 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:52:15,595 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:52:15,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:52:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:52:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:52:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:52:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-29 09:52:15,604 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-29 09:52:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:15,605 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-29 09:52:15,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:52:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-29 09:52:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:52:15,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:15,605 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:15,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:52:15,605 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1544807221, now seen corresponding path program 43 times [2020-10-29 09:52:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:15,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294820453] [2020-10-29 09:52:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:16,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:17,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:52:17,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:19,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:19,708 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 09:52:19,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294820453] [2020-10-29 09:52:19,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:19,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:52:19,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254106438] [2020-10-29 09:52:19,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:52:19,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:52:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:52:19,709 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 47 states. [2020-10-29 09:52:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:25,327 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-29 09:52:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:52:25,328 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-29 09:52:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:25,329 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:52:25,329 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:52:25,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:52:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:52:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 09:52:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:52:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-29 09:52:25,340 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-29 09:52:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:25,341 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-29 09:52:25,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:52:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-29 09:52:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:52:25,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:25,341 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:25,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:52:25,342 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1129252547, now seen corresponding path program 44 times [2020-10-29 09:52:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:25,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97630200] [2020-10-29 09:52:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:25,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:26,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:27,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:52:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:29,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:29,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:29,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:29,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:29,629 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 09:52:29,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97630200] [2020-10-29 09:52:29,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:29,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:52:29,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594232863] [2020-10-29 09:52:29,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:52:29,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:52:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:52:29,631 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 48 states. [2020-10-29 09:52:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:35,466 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-29 09:52:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:52:35,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-29 09:52:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:35,468 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:52:35,468 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:52:35,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:52:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:52:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:52:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:52:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-29 09:52:35,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-10-29 09:52:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:35,480 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-29 09:52:35,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:52:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-29 09:52:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:52:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:35,480 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:52:35,481 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1131959541, now seen corresponding path program 45 times [2020-10-29 09:52:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:35,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786992258] [2020-10-29 09:52:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:36,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:37,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:52:37,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:37,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2450 [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:52:37,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:40,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:40,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:40,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:40,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:40,149 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 09:52:40,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786992258] [2020-10-29 09:52:40,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:40,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:52:40,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762123976] [2020-10-29 09:52:40,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:52:40,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:40,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:52:40,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:52:40,151 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 49 states. [2020-10-29 09:52:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:46,350 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-29 09:52:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:52:46,351 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-29 09:52:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:46,352 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:52:46,352 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:52:46,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:52:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:52:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:52:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:52:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-29 09:52:46,361 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-10-29 09:52:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:46,362 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-29 09:52:46,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:52:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-29 09:52:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:52:46,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:46,362 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:46,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:52:46,363 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1215876355, now seen corresponding path program 46 times [2020-10-29 09:52:46,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674918416] [2020-10-29 09:52:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:49,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:49,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:52:49,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:49,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3333 [2020-10-29 09:52:49,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:49,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:49,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:52:49,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:52:49,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:52:49,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:52,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:52,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 45 proven. 1036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674918416] [2020-10-29 09:52:52,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:52,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:52:52,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785553663] [2020-10-29 09:52:52,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:52:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:52:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:52:52,253 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 50 states. [2020-10-29 09:52:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:57,856 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-29 09:52:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:52:57,857 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-29 09:52:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:57,858 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:52:57,858 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:52:57,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=440, Invalid=8872, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:52:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:52:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:52:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:52:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:52:57,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-10-29 09:52:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:57,860 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:52:57,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:52:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:52:57,860 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:52:57,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:52:57,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:52:58,439 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-29 09:52:58,732 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 191 [2020-10-29 09:52:59,289 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-29 09:53:01,972 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 333 DAG size of output: 211 [2020-10-29 09:53:02,299 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 24 [2020-10-29 09:53:02,303 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-29 09:53:02,304 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-29 09:53:02,304 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-29 09:53:02,304 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-29 09:53:02,304 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:53:02,305 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:53:02,305 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:53:02,305 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:53:02,305 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:53:02,305 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:53:02,305 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:53:02,305 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 7 9) no Hoare annotation was computed. [2020-10-29 09:53:02,305 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L274 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 17 34) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 17 34) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-29 09:53:02,306 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 17 34) the Hoare annotation is: true [2020-10-29 09:53:02,306 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse0 (div main_~k~0 2))) (or (and (<= main_~i~0 0) (= main_~k~0 (* .cse0 2)) (<= 0 main_~i~0) (<= main_~k~0 0)) (and (<= 2 (+ main_~j~0 main_~k~0 (* 2 (div (+ (* main_~j~0 (- 1)) (* main_~k~0 (- 1)) 2) 2)))) (<= main_~k~0 (* 2 .cse0))))) [2020-10-29 09:53:02,307 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 31) the Hoare annotation is: (let ((.cse5 (+ main_~i~0 2)) (.cse3 (div main_~k~0 2))) (let ((.cse0 (= main_~k~0 (* .cse3 2))) (.cse1 (<= main_~j~0 .cse5)) (.cse2 (<= .cse5 main_~j~0)) (.cse4 (<= main_~k~0 (* 2 .cse3)))) (or (and (<= main_~i~0 0) .cse0 (<= 0 main_~i~0) (<= main_~k~0 0)) (and (<= 28 main_~i~0) .cse1 .cse0 .cse2 (<= main_~i~0 28)) (and (<= main_~i~0 4) (< 1 .cse3) (<= 4 main_~i~0) .cse4) (and .cse1 (<= 16 main_~k~0) .cse2 (<= main_~i~0 16) (<= 16 main_~i~0) .cse4) (and .cse1 .cse0 (<= main_~i~0 24) .cse2 (<= 24 main_~i~0)) (and .cse1 .cse2 (<= 20 main_~i~0) (<= main_~i~0 20) .cse4 (<= 20 main_~k~0)) (and (<= 12 main_~i~0) .cse1 (<= 12 main_~k~0) (<= main_~i~0 12) .cse2 .cse4) (and (<= main_~i~0 8) .cse1 (<= 8 main_~i~0) .cse2 (< 3 .cse3) .cse4)))) [2020-10-29 09:53:02,307 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-29 09:53:02,307 INFO L270 CegarLoopResult]: At program point L22-2(lines 22 26) the Hoare annotation is: (let ((.cse3 (+ main_~i~0 2))) (let ((.cse2 (div main_~j~0 2)) (.cse0 (<= main_~j~0 .cse3)) (.cse1 (<= .cse3 main_~j~0))) (or (and .cse0 (<= 46 main_~j~0) (<= main_~i~0 44)) (and (<= 56 main_~i~0) .cse0 (<= main_~i~0 56) .cse1) (and (<= main_~i~0 136) .cse0 (<= 138 main_~j~0)) (and (<= main_~i~0 160) .cse0 .cse1 (<= 160 main_~i~0)) (and .cse0 (<= 148 main_~i~0) .cse1 (<= main_~i~0 148)) (and .cse0 (<= main_~i~0 36) (< 18 .cse2)) (and .cse0 (<= main_~i~0 152) (<= 154 main_~j~0)) (and .cse0 (<= main_~i~0 32) .cse1 (<= 32 main_~i~0)) (and .cse0 (<= main_~i~0 84) (< 42 .cse2)) (and (<= main_~i~0 168) .cse0 (<= 168 main_~i~0) .cse1) (and .cse0 .cse1 (<= main_~i~0 96) (<= 96 main_~i~0)) (and (<= main_~i~0 4) .cse0 (<= 4 main_~i~0) .cse1) (and .cse0 (<= main_~i~0 100) (< 50 .cse2)) (and (<= 12 main_~i~0) .cse0 (<= main_~i~0 12) .cse1) (and .cse0 .cse1 (<= main_~i~0 112) (<= 112 main_~i~0)) (and .cse0 (<= 156 main_~i~0) (<= main_~i~0 156) .cse1) (and (<= main_~i~0 144) .cse0 .cse1 (<= 144 main_~i~0)) (and (<= main_~i~0 8) .cse0 (<= 8 main_~i~0) .cse1) (and .cse0 (<= main_~i~0 40) (<= 42 main_~j~0)) (and (<= 28 main_~i~0) .cse0 .cse1 (<= main_~i~0 28)) (and .cse0 (<= main_~i~0 80) (<= 82 main_~j~0)) (and .cse0 (<= main_~i~0 68) (< 34 .cse2)) (and .cse0 (<= main_~i~0 108) (<= 108 main_~i~0) .cse1) (and (<= main_~i~0 0) (<= 0 main_~i~0)) (and .cse0 (<= 176 main_~i~0) .cse1 (<= main_~i~0 176)) (and .cse0 .cse1 (<= main_~i~0 124) (<= 124 main_~i~0)) (and .cse0 (<= main_~i~0 52) (< 26 .cse2)) (and .cse0 .cse1 (<= main_~i~0 60) (<= 60 main_~i~0)) (and .cse0 .cse1 (<= main_~i~0 164) (<= 164 main_~i~0)) (and (<= main_~i~0 172) .cse0 .cse1 (<= 172 main_~i~0)) (and (<= main_~i~0 72) (<= 72 main_~i~0) .cse0 .cse1) (and .cse0 (< 66 .cse2) (<= main_~i~0 132)) (and (<= main_~i~0 88) .cse0 .cse1 (<= 88 main_~i~0)) (and .cse0 (<= 48 main_~i~0) .cse1 (<= main_~i~0 48)) (and .cse0 (<= main_~i~0 64) .cse1 (<= 64 main_~i~0)) (and .cse0 (<= main_~i~0 140) (<= 142 main_~j~0)) (and .cse0 (<= 78 main_~j~0) (<= main_~i~0 76)) (and .cse0 (<= main_~i~0 104) (<= 104 main_~i~0) .cse1) (and .cse0 (<= main_~i~0 128) (< 64 .cse2)) (and .cse0 (<= main_~i~0 120) .cse1 (<= 120 main_~i~0)) (and .cse0 .cse1 (<= main_~i~0 16) (<= 16 main_~i~0)) (and .cse0 (<= 180 main_~i~0) .cse1 (<= (+ main_~i~0 (* 2 (div (+ (* main_~i~0 (- 1)) (- 147)) 2)) 148) 0)) (and .cse0 (<= main_~i~0 92) (< 46 .cse2)) (and .cse0 (<= main_~i~0 116) .cse1 (<= 116 main_~i~0)) (and .cse0 (<= main_~i~0 24) .cse1 (<= 24 main_~i~0)) (and .cse0 .cse1 (<= 20 main_~i~0) (<= main_~i~0 20))))) [2020-10-29 09:53:02,307 INFO L274 CegarLoopResult]: For program point L22-3(lines 22 26) no Hoare annotation was computed. [2020-10-29 09:53:02,308 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2020-10-29 09:53:02,308 INFO L270 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-29 09:53:02,308 INFO L274 CegarLoopResult]: For program point L11(lines 11 13) no Hoare annotation was computed. [2020-10-29 09:53:02,308 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-29 09:53:02,308 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 15) no Hoare annotation was computed. [2020-10-29 09:53:02,308 INFO L274 CegarLoopResult]: For program point L11-2(lines 10 15) no Hoare annotation was computed. [2020-10-29 09:53:02,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:53:02 BoogieIcfgContainer [2020-10-29 09:53:02,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:53:02,352 INFO L168 Benchmark]: Toolchain (without parser) took 216471.46 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 126.6 MB in the beginning and 169.3 MB in the end (delta: -42.7 MB). Peak memory consumption was 267.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:53:02,353 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.4 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:53:02,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:53:02,353 INFO L168 Benchmark]: Boogie Preprocessor took 61.56 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:53:02,354 INFO L168 Benchmark]: RCFGBuilder took 680.18 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 101.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:53:02,354 INFO L168 Benchmark]: TraceAbstraction took 215379.37 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 100.8 MB in the beginning and 169.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 241.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:53:02,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.4 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 331.50 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.56 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 680.18 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 101.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 215379.37 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 100.8 MB in the beginning and 169.3 MB in the end (delta: -68.5 MB). Peak memory consumption was 241.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((j <= i + 2 && 46 <= j) && i <= 44) || (((56 <= i && j <= i + 2) && i <= 56) && i + 2 <= j)) || ((i <= 136 && j <= i + 2) && 138 <= j)) || (((i <= 160 && j <= i + 2) && i + 2 <= j) && 160 <= i)) || (((j <= i + 2 && 148 <= i) && i + 2 <= j) && i <= 148)) || ((j <= i + 2 && i <= 36) && 18 < j / 2)) || ((j <= i + 2 && i <= 152) && 154 <= j)) || (((j <= i + 2 && i <= 32) && i + 2 <= j) && 32 <= i)) || ((j <= i + 2 && i <= 84) && 42 < j / 2)) || (((i <= 168 && j <= i + 2) && 168 <= i) && i + 2 <= j)) || (((j <= i + 2 && i + 2 <= j) && i <= 96) && 96 <= i)) || (((i <= 4 && j <= i + 2) && 4 <= i) && i + 2 <= j)) || ((j <= i + 2 && i <= 100) && 50 < j / 2)) || (((12 <= i && j <= i + 2) && i <= 12) && i + 2 <= j)) || (((j <= i + 2 && i + 2 <= j) && i <= 112) && 112 <= i)) || (((j <= i + 2 && 156 <= i) && i <= 156) && i + 2 <= j)) || (((i <= 144 && j <= i + 2) && i + 2 <= j) && 144 <= i)) || (((i <= 8 && j <= i + 2) && 8 <= i) && i + 2 <= j)) || ((j <= i + 2 && i <= 40) && 42 <= j)) || (((28 <= i && j <= i + 2) && i + 2 <= j) && i <= 28)) || ((j <= i + 2 && i <= 80) && 82 <= j)) || ((j <= i + 2 && i <= 68) && 34 < j / 2)) || (((j <= i + 2 && i <= 108) && 108 <= i) && i + 2 <= j)) || (i <= 0 && 0 <= i)) || (((j <= i + 2 && 176 <= i) && i + 2 <= j) && i <= 176)) || (((j <= i + 2 && i + 2 <= j) && i <= 124) && 124 <= i)) || ((j <= i + 2 && i <= 52) && 26 < j / 2)) || (((j <= i + 2 && i + 2 <= j) && i <= 60) && 60 <= i)) || (((j <= i + 2 && i + 2 <= j) && i <= 164) && 164 <= i)) || (((i <= 172 && j <= i + 2) && i + 2 <= j) && 172 <= i)) || (((i <= 72 && 72 <= i) && j <= i + 2) && i + 2 <= j)) || ((j <= i + 2 && 66 < j / 2) && i <= 132)) || (((i <= 88 && j <= i + 2) && i + 2 <= j) && 88 <= i)) || (((j <= i + 2 && 48 <= i) && i + 2 <= j) && i <= 48)) || (((j <= i + 2 && i <= 64) && i + 2 <= j) && 64 <= i)) || ((j <= i + 2 && i <= 140) && 142 <= j)) || ((j <= i + 2 && 78 <= j) && i <= 76)) || (((j <= i + 2 && i <= 104) && 104 <= i) && i + 2 <= j)) || ((j <= i + 2 && i <= 128) && 64 < j / 2)) || (((j <= i + 2 && i <= 120) && i + 2 <= j) && 120 <= i)) || (((j <= i + 2 && i + 2 <= j) && i <= 16) && 16 <= i)) || (((j <= i + 2 && 180 <= i) && i + 2 <= j) && i + 2 * ((i * -1 + -147) / 2) + 148 <= 0)) || ((j <= i + 2 && i <= 92) && 46 < j / 2)) || (((j <= i + 2 && i <= 116) && i + 2 <= j) && 116 <= i)) || (((j <= i + 2 && i <= 24) && i + 2 <= j) && 24 <= i)) || (((j <= i + 2 && i + 2 <= j) && 20 <= i) && i <= 20) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((i <= 0 && k == k / 2 * 2) && 0 <= i) && k <= 0) || (2 <= j + k + 2 * ((j * -1 + k * -1 + 2) / 2) && k <= 2 * (k / 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 210.7s, OverallIterations: 48, TraceHistogramMax: 46, AutomataDifference: 116.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 635 SDtfs, 642 SDslu, 6912 SDs, 0 SdLazy, 45788 SolverSat, 1245 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2504 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17737 ImplicationChecksByTransitivity, 118.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 48 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 153 PreInvPairs, 255 NumberOfFragments, 1005 HoareAnnotationTreeSize, 153 FomulaSimplifications, 4289 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 10 FomulaSimplificationsInter, 5708 FormulaSimplificationTreeSizeReductionInter, 3.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 91.8s InterpolantComputationTime, 1803 NumberOfCodeBlocks, 1803 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 486982 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 1 PerfectInterpolantSequences, 46/17298 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...