/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:45:46,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:45:46,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:45:46,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:45:46,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:45:46,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:45:46,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:45:46,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:45:46,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:45:46,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:45:46,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:45:46,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:45:46,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:45:46,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:45:46,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:45:46,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:45:46,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:45:46,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:45:46,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:45:46,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:45:46,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:45:46,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:45:46,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:45:46,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:45:46,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:45:46,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:45:46,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:45:46,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:45:46,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:45:46,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:45:46,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:45:46,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:45:46,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:45:46,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:45:46,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:45:46,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:45:46,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:45:46,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:45:46,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:45:46,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:45:46,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:45:46,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:45:46,276 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:45:46,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:45:46,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:45:46,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:45:46,278 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:45:46,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:45:46,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:45:46,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:45:46,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:45:46,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:45:46,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:45:46,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:45:46,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:45:46,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:45:46,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:45:46,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:45:46,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:45:46,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:45:46,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:45:46,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:45:46,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:45:46,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:45:46,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:45:46,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:45:46,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:45:46,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:45:46,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:45:46,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:45:46,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:45:46,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:45:46,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:45:46,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:45:46,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:45:46,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:45:46,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:45:46,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-26 19:45:46,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61b580d67/345448d42227465491994aa7984cc41c/FLAG573fe93a4 [2020-10-26 19:45:47,522 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:45:47,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-1.i [2020-10-26 19:45:47,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61b580d67/345448d42227465491994aa7984cc41c/FLAG573fe93a4 [2020-10-26 19:45:47,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/61b580d67/345448d42227465491994aa7984cc41c [2020-10-26 19:45:47,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:45:47,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:45:47,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:45:47,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:45:47,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:45:47,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:45:47" (1/1) ... [2020-10-26 19:45:47,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af2db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:47, skipping insertion in model container [2020-10-26 19:45:47,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:45:47" (1/1) ... [2020-10-26 19:45:47,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:45:47,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:45:48,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:45:48,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:45:48,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:45:48,175 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:45:48,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48 WrapperNode [2020-10-26 19:45:48,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:45:48,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:45:48,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:45:48,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:45:48,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... [2020-10-26 19:45:48,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:45:48,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:45:48,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:45:48,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:45:48,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:45:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:45:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:45:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:45:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:45:48,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:45:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:45:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:45:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:45:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:45:48,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:45:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:45:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:45:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:45:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:45:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:45:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:45:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:45:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:45:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 19:45:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 19:45:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:45:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:45:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:45:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:45:48,929 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:45:48,930 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:45:48,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:45:48 BoogieIcfgContainer [2020-10-26 19:45:48,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:45:48,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:45:48,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:45:48,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:45:48,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:45:47" (1/3) ... [2020-10-26 19:45:48,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4847f784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:45:48, skipping insertion in model container [2020-10-26 19:45:48,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:48" (2/3) ... [2020-10-26 19:45:48,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4847f784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:45:48, skipping insertion in model container [2020-10-26 19:45:48,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:45:48" (3/3) ... [2020-10-26 19:45:48,950 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2020-10-26 19:45:48,963 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:45:48,970 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:45:48,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:45:49,032 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:45:49,033 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:45:49,033 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:45:49,033 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:45:49,033 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:45:49,033 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:45:49,033 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:45:49,033 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:45:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:45:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:45:49,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:49,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:49,076 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1288471925, now seen corresponding path program 1 times [2020-10-26 19:45:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:49,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9273825] [2020-10-26 19:45:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:49,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:45:49,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:49,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-26 19:45:49,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:45:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:45:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:45:49,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:45:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:50,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:50,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 19:45:50,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:50,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:45:50,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:45:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:50,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9273825] [2020-10-26 19:45:50,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:45:50,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:45:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556046117] [2020-10-26 19:45:50,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:45:50,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:50,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:45:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:45:50,275 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-10-26 19:45:50,594 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-26 19:45:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:50,945 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-26 19:45:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:45:50,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-26 19:45:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:50,957 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:45:50,957 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:45:50,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:45:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:45:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-26 19:45:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:45:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-26 19:45:51,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2020-10-26 19:45:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:51,009 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-26 19:45:51,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:45:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-26 19:45:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:45:51,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:51,011 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:51,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:45:51,011 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash 772836779, now seen corresponding path program 1 times [2020-10-26 19:45:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:51,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98472343] [2020-10-26 19:45:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:51,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:51,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:51,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:45:51,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-26 19:45:51,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:51,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:45:51,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:45:51,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:45:51,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:45:51,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:51,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:51,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:51,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:51,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:45:51,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:45:51,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:45:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:45:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98472343] [2020-10-26 19:45:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:51,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:45:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349852101] [2020-10-26 19:45:51,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:45:51,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:45:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:45:51,650 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-26 19:45:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:52,000 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-10-26 19:45:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:45:52,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:45:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:52,002 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:45:52,003 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:45:52,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:45:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:45:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-26 19:45:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:45:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-26 19:45:52,012 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-10-26 19:45:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:52,013 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-26 19:45:52,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:45:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-26 19:45:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:45:52,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:52,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:52,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:45:52,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1924609839, now seen corresponding path program 1 times [2020-10-26 19:45:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:52,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606450670] [2020-10-26 19:45:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:52,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:52,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:52,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:53,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:45:53,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:45:53,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1046 [2020-10-26 19:45:53,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:45:53,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:45:53,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:45:53,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:53,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:53,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:53,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:53,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:45:53,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:53,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:53,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:45:53,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606450670] [2020-10-26 19:45:53,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:53,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:45:53,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074182412] [2020-10-26 19:45:53,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:45:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:45:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:45:53,437 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 10 states. [2020-10-26 19:45:54,051 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:45:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:54,396 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-26 19:45:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:45:54,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-26 19:45:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:54,398 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:45:54,400 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:45:54,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:45:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:45:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-26 19:45:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:45:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-26 19:45:54,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 22 [2020-10-26 19:45:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:54,411 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-26 19:45:54,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:45:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-26 19:45:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:45:54,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:54,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:54,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:45:54,413 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1178608648, now seen corresponding path program 1 times [2020-10-26 19:45:54,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:54,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573018486] [2020-10-26 19:45:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:55,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:57,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:57,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:45:57,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:45:57,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2801 [2020-10-26 19:45:57,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:45:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:45:57,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:45:57,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:45:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:57,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:57,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:57,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:57,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:57,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:45:57,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:57,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:45:57,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:45:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:45:57,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573018486] [2020-10-26 19:45:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:57,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:45:57,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506362090] [2020-10-26 19:45:57,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:45:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:45:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:45:57,541 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 8 states. [2020-10-26 19:45:57,841 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-26 19:45:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:58,286 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2020-10-26 19:45:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:45:58,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-26 19:45:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:58,288 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:45:58,289 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:45:58,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:45:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:45:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-26 19:45:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:45:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-26 19:45:58,300 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 23 [2020-10-26 19:45:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:58,300 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-26 19:45:58,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:45:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-26 19:45:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:45:58,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:58,302 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:58,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:45:58,302 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1664436056, now seen corresponding path program 1 times [2020-10-26 19:45:58,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:58,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555084302] [2020-10-26 19:45:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:00,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:00,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:46:00,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:46:00,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2660 [2020-10-26 19:46:00,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:00,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:46:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:00,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:46:00,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:01,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:01,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:01,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:01,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:46:01,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:01,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:01,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555084302] [2020-10-26 19:46:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:46:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763798095] [2020-10-26 19:46:01,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:46:01,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:46:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:46:01,368 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-26 19:46:02,026 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-26 19:46:02,256 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-26 19:46:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:02,845 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-26 19:46:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:46:02,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-26 19:46:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:02,847 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:46:02,847 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:46:02,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:46:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:46:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-26 19:46:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:46:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-26 19:46:02,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 26 [2020-10-26 19:46:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:02,859 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-26 19:46:02,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:46:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-26 19:46:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:46:02,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:02,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:02,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:46:02,861 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash -616404014, now seen corresponding path program 2 times [2020-10-26 19:46:02,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:02,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973066438] [2020-10-26 19:46:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:02,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:02,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:03,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:03,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:04,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:46:04,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:04,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:46:04,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:05,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:05,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:05,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:05,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973066438] [2020-10-26 19:46:05,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:05,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:05,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040192000] [2020-10-26 19:46:05,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:05,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:05,136 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 13 states. [2020-10-26 19:46:05,359 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-26 19:46:05,508 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-26 19:46:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:06,663 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-10-26 19:46:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:46:06,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-26 19:46:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:06,667 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:46:06,668 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:46:06,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:46:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:46:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 64. [2020-10-26 19:46:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:46:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2020-10-26 19:46:06,697 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 27 [2020-10-26 19:46:06,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:06,697 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2020-10-26 19:46:06,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:06,698 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2020-10-26 19:46:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:46:06,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:06,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:06,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:46:06,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash -283409467, now seen corresponding path program 1 times [2020-10-26 19:46:06,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:06,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609657327] [2020-10-26 19:46:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:06,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:06,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:07,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:07,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:07,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:09,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:09,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:46:09,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:46:09,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2381 [2020-10-26 19:46:09,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:46:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:46:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:09,502 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-26 19:46:10,094 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-26 19:46:10,435 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2020-10-26 19:46:10,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:10,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:10,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609657327] [2020-10-26 19:46:10,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:10,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419493778] [2020-10-26 19:46:10,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:10,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:10,636 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand 13 states. [2020-10-26 19:46:10,874 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-26 19:46:10,991 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-26 19:46:11,541 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-26 19:46:11,847 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 19:46:12,102 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-26 19:46:12,845 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-26 19:46:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:13,417 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2020-10-26 19:46:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:46:13,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-26 19:46:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:13,420 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:46:13,420 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:46:13,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:46:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:46:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2020-10-26 19:46:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:46:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2020-10-26 19:46:13,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 28 [2020-10-26 19:46:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:13,435 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2020-10-26 19:46:13,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2020-10-26 19:46:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:46:13,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:13,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:13,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:46:13,437 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash 226931607, now seen corresponding path program 1 times [2020-10-26 19:46:13,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:13,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632979083] [2020-10-26 19:46:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:13,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:13,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:14,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3107 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:16,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:46:16,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:17,229 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:46:17,710 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-26 19:46:18,247 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2020-10-26 19:46:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:18,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:18,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:18,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:18,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:46:18,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:18,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:18,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:18,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:18,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:18,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632979083] [2020-10-26 19:46:18,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:18,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:46:18,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281452065] [2020-10-26 19:46:18,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:46:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:18,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:46:18,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:46:18,601 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand 17 states. [2020-10-26 19:46:19,264 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-26 19:46:19,508 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-26 19:46:20,411 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-26 19:46:22,205 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2020-10-26 19:46:23,502 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 133 DAG size of output: 129 [2020-10-26 19:46:24,973 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 114 [2020-10-26 19:46:26,054 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-26 19:46:26,662 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-26 19:46:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:27,046 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2020-10-26 19:46:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:46:27,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-26 19:46:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:27,049 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:46:27,049 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:46:27,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:46:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:46:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2020-10-26 19:46:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:46:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2020-10-26 19:46:27,075 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 28 [2020-10-26 19:46:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:27,075 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2020-10-26 19:46:27,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:46:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2020-10-26 19:46:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:46:27,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:27,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:27,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:46:27,079 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1462012135, now seen corresponding path program 1 times [2020-10-26 19:46:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:27,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525225196] [2020-10-26 19:46:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:27,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:28,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:28,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:46:28,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:46:28,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-26 19:46:28,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:28,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:46:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:28,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:46:28,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:28,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:28,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:28,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:28,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525225196] [2020-10-26 19:46:28,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:28,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:28,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853012804] [2020-10-26 19:46:28,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:28,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:28,995 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 13 states. [2020-10-26 19:46:29,799 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-26 19:46:30,055 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-26 19:46:30,285 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-26 19:46:30,676 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:46:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:30,997 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2020-10-26 19:46:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:46:30,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-26 19:46:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:31,000 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:46:31,000 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:46:31,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:46:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:46:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 59. [2020-10-26 19:46:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:46:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2020-10-26 19:46:31,017 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 28 [2020-10-26 19:46:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:31,017 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2020-10-26 19:46:31,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2020-10-26 19:46:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:46:31,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:31,019 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:31,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:46:31,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:31,025 INFO L82 PathProgramCache]: Analyzing trace with hash 977405987, now seen corresponding path program 1 times [2020-10-26 19:46:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:31,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208363974] [2020-10-26 19:46:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:31,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:31,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:31,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3262 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:34,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:46:34,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:34,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:34,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:34,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:46:34,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208363974] [2020-10-26 19:46:34,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:34,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:46:34,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996750196] [2020-10-26 19:46:34,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:46:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:34,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:46:34,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:46:34,538 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 8 states. [2020-10-26 19:46:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:34,854 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-10-26 19:46:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:46:34,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-26 19:46:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:34,856 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:46:34,856 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:46:34,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:46:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:46:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-26 19:46:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:46:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2020-10-26 19:46:34,872 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 30 [2020-10-26 19:46:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:34,873 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2020-10-26 19:46:34,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:46:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2020-10-26 19:46:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:46:34,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:34,874 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:34,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:46:34,875 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1035647932, now seen corresponding path program 1 times [2020-10-26 19:46:34,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:34,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827666339] [2020-10-26 19:46:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:34,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:39,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:46:39,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:46:39,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:46:39,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:46:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:39,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:46:39,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:46:40,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:40,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:40,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:46:40,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:40,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:40,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827666339] [2020-10-26 19:46:40,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:40,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:46:40,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318717767] [2020-10-26 19:46:40,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:46:40,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:46:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:46:40,397 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 11 states. [2020-10-26 19:46:40,626 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-26 19:46:40,946 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-26 19:46:41,447 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-26 19:46:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:42,092 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-26 19:46:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:46:42,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:46:42,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:42,094 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:46:42,094 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:46:42,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:46:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:46:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-26 19:46:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:46:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-26 19:46:42,109 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 31 [2020-10-26 19:46:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:42,109 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-26 19:46:42,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:46:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-26 19:46:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:46:42,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:42,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:42,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:46:42,111 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1516764791, now seen corresponding path program 1 times [2020-10-26 19:46:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:42,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820418287] [2020-10-26 19:46:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:42,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:44,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:44,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:46:44,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:46:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2174 [2020-10-26 19:46:44,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:46:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:46:44,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:46:44,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:45,171 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-10-26 19:46:45,512 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-26 19:46:45,975 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-26 19:46:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:46,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:46,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:46,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:46:46,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:46:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820418287] [2020-10-26 19:46:46,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:46,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:46,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598721654] [2020-10-26 19:46:46,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:46,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:46,195 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 13 states. [2020-10-26 19:46:46,472 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2020-10-26 19:46:46,660 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 53 [2020-10-26 19:46:47,004 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-26 19:46:50,544 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 129 DAG size of output: 83 [2020-10-26 19:46:51,172 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-26 19:46:53,616 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 131 DAG size of output: 85 [2020-10-26 19:46:54,238 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 19:46:55,410 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 19:46:55,976 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 19:46:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:56,425 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2020-10-26 19:46:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:46:56,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-26 19:46:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:56,427 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:46:56,427 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:46:56,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:46:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:46:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-26 19:46:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:46:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-26 19:46:56,443 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 31 [2020-10-26 19:46:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:56,443 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-26 19:46:56,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-26 19:46:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:46:56,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:56,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:56,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:46:56,444 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 288735504, now seen corresponding path program 1 times [2020-10-26 19:46:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:56,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112112129] [2020-10-26 19:46:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:56,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:57,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:57,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:58,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:01,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:47:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:47:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:01,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:01,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:01,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:01,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:01,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112112129] [2020-10-26 19:47:01,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:01,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:47:01,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24950998] [2020-10-26 19:47:01,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:47:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:47:01,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:47:01,958 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 11 states. [2020-10-26 19:47:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:02,906 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2020-10-26 19:47:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:47:02,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:47:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:02,908 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:47:02,908 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:47:02,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:47:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:47:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-10-26 19:47:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:47:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-10-26 19:47:02,936 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 32 [2020-10-26 19:47:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:02,936 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-10-26 19:47:02,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:47:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-10-26 19:47:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:47:02,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:02,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:02,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:47:02,939 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1400208238, now seen corresponding path program 1 times [2020-10-26 19:47:02,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:02,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460530330] [2020-10-26 19:47:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:04,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:04,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:05,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:47:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:08,344 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-10-26 19:47:08,593 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:47:09,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:09,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:09,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:09,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460530330] [2020-10-26 19:47:09,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:09,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:47:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661040079] [2020-10-26 19:47:09,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:47:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:47:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:47:09,147 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 18 states. [2020-10-26 19:47:10,230 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-26 19:47:10,866 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-26 19:47:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:11,816 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2020-10-26 19:47:11,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:47:11,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-10-26 19:47:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:11,820 INFO L225 Difference]: With dead ends: 163 [2020-10-26 19:47:11,820 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:47:11,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:47:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:47:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-26 19:47:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:47:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2020-10-26 19:47:11,849 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 32 [2020-10-26 19:47:11,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:11,852 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2020-10-26 19:47:11,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:47:11,853 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2020-10-26 19:47:11,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:47:11,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:11,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:11,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:47:11,855 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1089320724, now seen corresponding path program 1 times [2020-10-26 19:47:11,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659949702] [2020-10-26 19:47:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:11,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:12,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:13,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:13,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:16,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:16,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:47:16,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:47:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:47:16,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:47:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:47:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:17,421 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-26 19:47:17,669 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-26 19:47:17,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:17,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:17,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:17,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:47:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:17,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:17,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659949702] [2020-10-26 19:47:17,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:17,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:47:17,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657811399] [2020-10-26 19:47:17,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:47:17,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:47:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:47:17,858 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand 12 states. [2020-10-26 19:47:18,192 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-26 19:47:18,548 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-26 19:47:18,730 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-26 19:47:19,492 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-26 19:47:20,036 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-26 19:47:20,478 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-26 19:47:21,039 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-26 19:47:21,550 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-26 19:47:22,007 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 19:47:22,372 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-26 19:47:22,724 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 19:47:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:23,373 INFO L93 Difference]: Finished difference Result 186 states and 232 transitions. [2020-10-26 19:47:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:47:23,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-26 19:47:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:23,377 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:47:23,377 INFO L226 Difference]: Without dead ends: 151 [2020-10-26 19:47:23,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:47:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-26 19:47:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2020-10-26 19:47:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:47:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2020-10-26 19:47:23,401 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 32 [2020-10-26 19:47:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:23,401 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2020-10-26 19:47:23,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:47:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2020-10-26 19:47:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:47:23,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:23,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:23,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:47:23,403 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1220914457, now seen corresponding path program 1 times [2020-10-26 19:47:23,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535716020] [2020-10-26 19:47:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:23,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:27,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:28,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:47:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:28,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:47:28,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:28,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:28,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:28,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:28,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535716020] [2020-10-26 19:47:28,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:28,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:47:28,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321361944] [2020-10-26 19:47:28,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:47:28,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:47:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:47:28,897 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 11 states. [2020-10-26 19:47:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:30,124 INFO L93 Difference]: Finished difference Result 174 states and 223 transitions. [2020-10-26 19:47:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:47:30,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-26 19:47:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:30,127 INFO L225 Difference]: With dead ends: 174 [2020-10-26 19:47:30,127 INFO L226 Difference]: Without dead ends: 149 [2020-10-26 19:47:30,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:47:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-26 19:47:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2020-10-26 19:47:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:47:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2020-10-26 19:47:30,152 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 33 [2020-10-26 19:47:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:30,153 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2020-10-26 19:47:30,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:47:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2020-10-26 19:47:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:47:30,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:30,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:30,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:47:30,154 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1015276248, now seen corresponding path program 2 times [2020-10-26 19:47:30,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:30,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242297582] [2020-10-26 19:47:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:30,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:30,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:30,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:34,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4123 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:34,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:47:34,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:34,495 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 16 [2020-10-26 19:47:34,619 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-10-26 19:47:34,764 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-26 19:47:35,132 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-26 19:47:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:35,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:35,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:35,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:35,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:47:35,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:35,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:35,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242297582] [2020-10-26 19:47:35,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:35,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:47:35,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662587678] [2020-10-26 19:47:35,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:47:35,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:35,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:47:35,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:47:35,860 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand 20 states. [2020-10-26 19:47:36,059 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 19:47:36,281 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-26 19:47:36,484 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-26 19:47:36,696 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-26 19:47:37,709 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-26 19:47:37,917 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-26 19:47:38,521 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-26 19:47:38,928 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-26 19:47:40,061 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-26 19:47:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:40,380 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2020-10-26 19:47:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:47:40,381 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-26 19:47:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:40,383 INFO L225 Difference]: With dead ends: 244 [2020-10-26 19:47:40,383 INFO L226 Difference]: Without dead ends: 240 [2020-10-26 19:47:40,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=467, Invalid=1885, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:47:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-26 19:47:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 142. [2020-10-26 19:47:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:47:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 181 transitions. [2020-10-26 19:47:40,422 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 181 transitions. Word has length 33 [2020-10-26 19:47:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:40,422 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 181 transitions. [2020-10-26 19:47:40,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:47:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 181 transitions. [2020-10-26 19:47:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:47:40,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:40,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:40,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:47:40,423 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1149289754, now seen corresponding path program 1 times [2020-10-26 19:47:40,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:40,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957539438] [2020-10-26 19:47:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:40,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:40,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:41,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 932 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:47:41,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:42,336 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-26 19:47:42,730 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-26 19:47:43,593 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-26 19:47:45,207 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-10-26 19:47:46,460 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-26 19:47:46,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:47:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:47:46,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957539438] [2020-10-26 19:47:46,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:46,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:47:46,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482716923] [2020-10-26 19:47:46,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:47:46,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:46,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:47:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:47:46,721 INFO L87 Difference]: Start difference. First operand 142 states and 181 transitions. Second operand 15 states. [2020-10-26 19:47:46,985 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-26 19:47:47,660 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-26 19:47:48,229 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-26 19:47:48,717 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-26 19:47:49,831 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 82 [2020-10-26 19:47:50,576 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-26 19:47:52,051 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 19:47:53,206 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 19:47:57,192 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2020-10-26 19:48:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:02,209 INFO L93 Difference]: Finished difference Result 277 states and 354 transitions. [2020-10-26 19:48:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:48:02,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-26 19:48:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:02,212 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:48:02,212 INFO L226 Difference]: Without dead ends: 226 [2020-10-26 19:48:02,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:48:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-26 19:48:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 148. [2020-10-26 19:48:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-26 19:48:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2020-10-26 19:48:02,248 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 33 [2020-10-26 19:48:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:02,248 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2020-10-26 19:48:02,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:48:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2020-10-26 19:48:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:48:02,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:02,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:02,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:48:02,249 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1318335519, now seen corresponding path program 3 times [2020-10-26 19:48:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:02,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155331708] [2020-10-26 19:48:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:02,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:05,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:07,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:48:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:07,536 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-10-26 19:48:08,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:08,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:08,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:08,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155331708] [2020-10-26 19:48:08,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:08,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:48:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627013113] [2020-10-26 19:48:08,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:48:08,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:48:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:48:08,418 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand 17 states. [2020-10-26 19:48:08,710 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-26 19:48:08,923 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-26 19:48:09,154 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-10-26 19:48:09,667 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-26 19:48:10,199 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-26 19:48:11,194 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-26 19:48:11,385 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-10-26 19:48:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:12,477 INFO L93 Difference]: Finished difference Result 315 states and 408 transitions. [2020-10-26 19:48:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:48:12,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-26 19:48:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:12,482 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:48:12,482 INFO L226 Difference]: Without dead ends: 300 [2020-10-26 19:48:12,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:48:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-26 19:48:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 162. [2020-10-26 19:48:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:48:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2020-10-26 19:48:12,524 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 34 [2020-10-26 19:48:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:12,524 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2020-10-26 19:48:12,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:48:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2020-10-26 19:48:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:48:12,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:12,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:12,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:48:12,525 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1192791240, now seen corresponding path program 1 times [2020-10-26 19:48:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:12,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287789926] [2020-10-26 19:48:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:12,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:12,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:13,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:17,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4605 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:48:17,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:17,602 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-26 19:48:17,745 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-26 19:48:17,964 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-26 19:48:18,274 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-26 19:48:18,639 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-26 19:48:19,135 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-10-26 19:48:19,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:19,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:19,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:19,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:19,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:48:19,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:19,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:19,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:19,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287789926] [2020-10-26 19:48:19,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:48:19,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126356514] [2020-10-26 19:48:19,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:48:19,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:19,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:48:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:48:19,561 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand 19 states. [2020-10-26 19:48:19,963 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-26 19:48:20,646 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-26 19:48:20,814 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-26 19:48:21,260 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-26 19:48:22,138 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 19:48:22,619 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 19:48:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:22,926 INFO L93 Difference]: Finished difference Result 334 states and 435 transitions. [2020-10-26 19:48:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:48:22,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-26 19:48:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:22,929 INFO L225 Difference]: With dead ends: 334 [2020-10-26 19:48:22,929 INFO L226 Difference]: Without dead ends: 262 [2020-10-26 19:48:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:48:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-26 19:48:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 183. [2020-10-26 19:48:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-26 19:48:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2020-10-26 19:48:22,962 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 35 [2020-10-26 19:48:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:22,963 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2020-10-26 19:48:22,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:48:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2020-10-26 19:48:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:48:22,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:22,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:22,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:48:22,964 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2010439690, now seen corresponding path program 1 times [2020-10-26 19:48:22,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:22,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593347053] [2020-10-26 19:48:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:23,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:24,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:26,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3776 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:48:26,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:26,959 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2020-10-26 19:48:27,121 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-26 19:48:27,326 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-26 19:48:27,539 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-26 19:48:28,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:28,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:28,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:28,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:28,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593347053] [2020-10-26 19:48:28,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:28,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:48:28,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702071453] [2020-10-26 19:48:28,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:48:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:48:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:48:28,502 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand 20 states. [2020-10-26 19:48:29,183 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-26 19:48:29,373 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-26 19:48:29,547 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:48:29,810 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-26 19:48:30,227 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-26 19:48:30,495 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-26 19:48:30,698 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:48:31,094 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:48:31,552 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:48:31,781 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:48:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:33,300 INFO L93 Difference]: Finished difference Result 267 states and 342 transitions. [2020-10-26 19:48:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:48:33,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-26 19:48:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:33,304 INFO L225 Difference]: With dead ends: 267 [2020-10-26 19:48:33,305 INFO L226 Difference]: Without dead ends: 263 [2020-10-26 19:48:33,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:48:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-26 19:48:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2020-10-26 19:48:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-26 19:48:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 264 transitions. [2020-10-26 19:48:33,349 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 264 transitions. Word has length 35 [2020-10-26 19:48:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:33,349 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 264 transitions. [2020-10-26 19:48:33,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:48:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 264 transitions. [2020-10-26 19:48:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:48:33,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:33,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:33,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:48:33,350 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1130751626, now seen corresponding path program 2 times [2020-10-26 19:48:33,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:33,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502013200] [2020-10-26 19:48:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:33,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:33,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:33,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:34,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:35,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:48:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:35,483 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 37 [2020-10-26 19:48:35,660 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2020-10-26 19:48:35,894 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40 [2020-10-26 19:48:36,123 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-26 19:48:36,406 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-26 19:48:36,847 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-26 19:48:37,139 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-26 19:48:37,497 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-26 19:48:37,840 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-26 19:48:38,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:38,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:38,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:38,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:38,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:38,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502013200] [2020-10-26 19:48:38,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:38,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:48:38,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883876880] [2020-10-26 19:48:38,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:48:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:48:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:48:38,366 INFO L87 Difference]: Start difference. First operand 201 states and 264 transitions. Second operand 21 states. [2020-10-26 19:48:38,812 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-26 19:48:39,206 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2020-10-26 19:48:39,430 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-26 19:48:40,372 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-26 19:48:40,708 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2020-10-26 19:48:41,159 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-10-26 19:48:41,423 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-10-26 19:48:41,817 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-26 19:48:42,439 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2020-10-26 19:48:42,809 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-26 19:48:43,208 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2020-10-26 19:48:43,538 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-26 19:48:44,011 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-26 19:48:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:45,568 INFO L93 Difference]: Finished difference Result 306 states and 403 transitions. [2020-10-26 19:48:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:48:45,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-26 19:48:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:45,573 INFO L225 Difference]: With dead ends: 306 [2020-10-26 19:48:45,574 INFO L226 Difference]: Without dead ends: 263 [2020-10-26 19:48:45,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:48:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-26 19:48:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 202. [2020-10-26 19:48:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:48:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2020-10-26 19:48:45,619 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 35 [2020-10-26 19:48:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:45,619 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2020-10-26 19:48:45,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:48:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2020-10-26 19:48:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:48:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:45,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:45,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:48:45,621 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash -140338037, now seen corresponding path program 2 times [2020-10-26 19:48:45,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:45,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507952294] [2020-10-26 19:48:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:50,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:48:50,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:50,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:48:50,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:50,876 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2020-10-26 19:48:51,059 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2020-10-26 19:48:51,410 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-10-26 19:48:51,674 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-26 19:48:51,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:51,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:48:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:51,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:48:51,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:48:51,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507952294] [2020-10-26 19:48:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:51,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:48:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029369310] [2020-10-26 19:48:51,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:48:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:48:52,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:48:52,001 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand 12 states. [2020-10-26 19:48:52,497 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:48:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:53,267 INFO L93 Difference]: Finished difference Result 230 states and 299 transitions. [2020-10-26 19:48:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:48:53,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-26 19:48:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:53,271 INFO L225 Difference]: With dead ends: 230 [2020-10-26 19:48:53,271 INFO L226 Difference]: Without dead ends: 204 [2020-10-26 19:48:53,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:48:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-26 19:48:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-26 19:48:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:48:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2020-10-26 19:48:53,315 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 36 [2020-10-26 19:48:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:53,316 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2020-10-26 19:48:53,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:48:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2020-10-26 19:48:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:48:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:53,317 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:53,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:48:53,317 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash 166516603, now seen corresponding path program 3 times [2020-10-26 19:48:53,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:53,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156121069] [2020-10-26 19:48:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:55,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:48:58,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,795 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-26 19:48:59,113 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-26 19:48:59,418 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-26 19:48:59,811 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-26 19:49:00,169 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-26 19:49:00,493 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-26 19:49:00,921 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-26 19:49:01,560 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-26 19:49:01,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:49:01,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:01,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:49:01,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:01,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156121069] [2020-10-26 19:49:01,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:01,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:49:01,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79011914] [2020-10-26 19:49:01,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:49:01,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:49:01,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:49:01,833 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 15 states. [2020-10-26 19:49:02,208 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-26 19:49:04,123 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-26 19:49:04,918 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 19:49:05,687 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 19:49:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:06,358 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2020-10-26 19:49:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:49:06,360 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-26 19:49:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:06,362 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:49:06,362 INFO L226 Difference]: Without dead ends: 220 [2020-10-26 19:49:06,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:49:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-26 19:49:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 207. [2020-10-26 19:49:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:49:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2020-10-26 19:49:06,438 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 36 [2020-10-26 19:49:06,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:06,438 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2020-10-26 19:49:06,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:49:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2020-10-26 19:49:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:49:06,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:06,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:06,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:49:06,439 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1978403039, now seen corresponding path program 2 times [2020-10-26 19:49:06,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:06,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478965615] [2020-10-26 19:49:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:06,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:11,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:11,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:49:11,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-26 19:49:11,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:49:11,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:11,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:49:11,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:49:11,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:49:11,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:12,847 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-26 19:49:13,223 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-26 19:49:13,880 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-26 19:49:15,838 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 142 DAG size of output: 113 [2020-10-26 19:49:17,571 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 136 DAG size of output: 107 [2020-10-26 19:49:20,562 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 139 DAG size of output: 113 [2020-10-26 19:49:22,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:22,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:49:22,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:49:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:49:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:22,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478965615] [2020-10-26 19:49:22,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:22,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:49:22,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466130584] [2020-10-26 19:49:22,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:49:22,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:49:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:49:22,922 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand 16 states. [2020-10-26 19:49:23,401 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-26 19:49:24,621 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 58 [2020-10-26 19:49:24,872 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-26 19:49:25,233 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-26 19:49:25,482 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-26 19:49:26,192 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53