/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:22:46,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:22:46,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:22:46,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:22:46,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:22:46,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:22:46,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:22:46,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:22:46,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:22:46,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:22:46,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:22:46,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:22:46,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:22:46,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:22:46,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:22:46,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:22:46,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:22:46,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:22:46,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:22:46,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:22:46,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:22:46,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:22:46,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:22:46,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:22:46,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:22:46,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:22:46,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:22:46,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:22:46,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:22:46,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:22:46,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:22:46,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:22:46,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:22:46,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:22:46,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:22:46,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:22:46,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:22:46,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:22:46,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:22:46,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:22:46,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:22:46,326 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 [2020-09-25 11:22:46,372 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:22:46,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:22:46,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:22:46,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:22:46,375 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:22:46,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:22:46,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:22:46,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:22:46,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:22:46,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:22:46,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:22:46,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:22:46,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:22:46,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:22:46,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:22:46,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:22:46,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:22:46,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:22:46,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:22:46,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:22:46,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:22:46,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:22:46,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:22:46,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:22:46,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:22:46,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:22:46,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:22:46,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:22:46,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:22:46,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:22:46,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:22:46,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:22:46,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:22:46,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:22:46,894 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:22:46,895 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 11:22:46,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f79aa468/76fc6495d73a469da26940e4effec0e0/FLAG17be41fd8 [2020-09-25 11:22:47,488 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:22:47,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 11:22:47,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f79aa468/76fc6495d73a469da26940e4effec0e0/FLAG17be41fd8 [2020-09-25 11:22:47,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f79aa468/76fc6495d73a469da26940e4effec0e0 [2020-09-25 11:22:47,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:22:47,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:22:47,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:22:47,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:22:47,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:22:47,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:22:47" (1/1) ... [2020-09-25 11:22:47,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187bf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:47, skipping insertion in model container [2020-09-25 11:22:47,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:22:47" (1/1) ... [2020-09-25 11:22:47,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:22:47,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:22:48,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:22:48,209 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:22:48,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:22:48,263 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:22:48,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48 WrapperNode [2020-09-25 11:22:48,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:22:48,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:22:48,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:22:48,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:22:48,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (1/1) ... [2020-09-25 11:22:48,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:22:48,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:22:48,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:22:48,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:22:48,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (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 [2020-09-25 11:22:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:22:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:22:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:22:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 11:22:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:22:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:22:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:22:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 11:22:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 11:22:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:22:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 11:22:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 11:22:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:22:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 11:22:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 11:22:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:22:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:22:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:22:48,795 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:22:48,796 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 11:22:48,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:22:48 BoogieIcfgContainer [2020-09-25 11:22:48,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:22:48,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:22:48,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:22:48,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:22:48,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:22:47" (1/3) ... [2020-09-25 11:22:48,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8d406d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:22:48, skipping insertion in model container [2020-09-25 11:22:48,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:22:48" (2/3) ... [2020-09-25 11:22:48,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8d406d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:22:48, skipping insertion in model container [2020-09-25 11:22:48,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:22:48" (3/3) ... [2020-09-25 11:22:48,815 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 11:22:48,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:22:48,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:22:48,870 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:22:48,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:22:48,906 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:22:48,906 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:22:48,906 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:22:48,906 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:22:48,907 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:22:48,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:22:48,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:22:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 11:22:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 11:22:48,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:22:48,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:22:48,948 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:22:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:22:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 11:22:48,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:22:48,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974915064] [2020-09-25 11:22:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:22:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:49,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:49,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:49,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:22:49,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:22:49,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-09-25 11:22:49,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:49,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:22:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 11:22:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 11:22:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:22:49,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:22:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:49,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:49,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:22:49,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:22:49,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:49,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:49,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:22:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:22:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:22:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:49,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:22:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:49,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:49,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:49,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:49,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:22:49,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:22:49,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 11:22:49,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:49,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:22:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:22:49,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:22:49,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:22:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:22:49,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974915064] [2020-09-25 11:22:49,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:22:49,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:22:49,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369717368] [2020-09-25 11:22:49,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:22:49,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:22:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:22:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:22:49,641 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 11:22:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:22:49,890 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 11:22:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:22:49,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 11:22:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:22:49,908 INFO L225 Difference]: With dead ends: 109 [2020-09-25 11:22:49,908 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 11:22:49,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:22:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 11:22:49,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 11:22:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 11:22:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 11:22:49,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 11:22:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:22:49,976 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 11:22:49,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:22:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 11:22:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 11:22:49,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:22:49,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:22:49,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:22:49,979 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:22:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:22:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 11:22:49,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:22:49,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275106828] [2020-09-25 11:22:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:22:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:50,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:50,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:51,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:51,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 11:22:51,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:22:51,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-09-25 11:22:51,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:51,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:22:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 11:22:51,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:22:51,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:22:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:22:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:52,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:52,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:22:52,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:52,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:22:52,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:52,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:22:52,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:22:52,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:22:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:52,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:52,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:52,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:22:52,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:22:52,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 11:22:52,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:52,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:22:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:22:52,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:22:52,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:22:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275106828] [2020-09-25 11:22:52,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:22:52,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:22:52,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172611743] [2020-09-25 11:22:52,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:22:52,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:22:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:22:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:22:52,248 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-25 11:22:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:22:53,162 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-25 11:22:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 11:22:53,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-25 11:22:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:22:53,167 INFO L225 Difference]: With dead ends: 128 [2020-09-25 11:22:53,167 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 11:22:53,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:22:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 11:22:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-25 11:22:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 11:22:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-25 11:22:53,185 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-25 11:22:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:22:53,186 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-25 11:22:53,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:22:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-25 11:22:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 11:22:53,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:22:53,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:22:53,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:22:53,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:22:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:22:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1998641845, now seen corresponding path program 1 times [2020-09-25 11:22:53,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:22:53,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603537325] [2020-09-25 11:22:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:22:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:53,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:53,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:54,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:54,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 11:22:54,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:22:54,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1542 [2020-09-25 11:22:54,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:54,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:22:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:22:54,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 11:22:54,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:22:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:54,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:54,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:54,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:22:54,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:54,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:22:54,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:54,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:22:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:22:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:22:54,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:54,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:22:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:54,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:54,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:54,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:22:54,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 11:22:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:54,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:22:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:22:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:22:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:22:54,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603537325] [2020-09-25 11:22:54,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:22:54,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:22:54,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126341580] [2020-09-25 11:22:54,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:22:54,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:22:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:22:54,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:22:54,951 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 9 states. [2020-09-25 11:22:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:22:55,222 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-09-25 11:22:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:22:55,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 11:22:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:22:55,224 INFO L225 Difference]: With dead ends: 129 [2020-09-25 11:22:55,224 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 11:22:55,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:22:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 11:22:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-09-25 11:22:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 11:22:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-25 11:22:55,236 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-25 11:22:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:22:55,237 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-25 11:22:55,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:22:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-25 11:22:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:22:55,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:22:55,239 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:22:55,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:22:55,239 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:22:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:22:55,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1456554063, now seen corresponding path program 2 times [2020-09-25 11:22:55,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:22:55,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260252323] [2020-09-25 11:22:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:22:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:55,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:55,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:55,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:57,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:57,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 11:22:57,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:22:57,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2567 [2020-09-25 11:22:57,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:57,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:22:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:22:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:22:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:57,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:22:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:57,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:57,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:57,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:22:57,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:22:57,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:57,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:22:57,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:22:57,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:22:57,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:57,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:22:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:57,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:58,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:22:58,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:22:58,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:22:58,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 11:22:58,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:22:58,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:22:58,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:22:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:22:58,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:22:58,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:22:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:22:58,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260252323] [2020-09-25 11:22:58,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:22:58,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:22:58,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439902250] [2020-09-25 11:22:58,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:22:58,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:22:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:22:58,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:22:58,252 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-09-25 11:22:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:22:58,616 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-09-25 11:22:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:22:58,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-25 11:22:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:22:58,618 INFO L225 Difference]: With dead ends: 135 [2020-09-25 11:22:58,619 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 11:22:58,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:22:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 11:22:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-25 11:22:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 11:22:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-09-25 11:22:58,639 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2020-09-25 11:22:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:22:58,641 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-09-25 11:22:58,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:22:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-09-25 11:22:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 11:22:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:22:58,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:22:58,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:22:58,644 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:22:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:22:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2095314861, now seen corresponding path program 3 times [2020-09-25 11:22:58,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:22:58,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303298678] [2020-09-25 11:22:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:22:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:22:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:22:58,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:02,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:02,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 11:23:02,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3453 [2020-09-25 11:23:02,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:02,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:02,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:23:02,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:02,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:02,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:02,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:02,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:23:02,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:02,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:02,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:02,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:23:02,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:02,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:02,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 11:23:02,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:02,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-25 11:23:02,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:02,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:02,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:02,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:02,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:23:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:23:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303298678] [2020-09-25 11:23:02,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:02,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:02,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262609644] [2020-09-25 11:23:02,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:02,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:02,501 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 13 states. [2020-09-25 11:23:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:03,002 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-09-25 11:23:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:23:03,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-25 11:23:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:03,004 INFO L225 Difference]: With dead ends: 141 [2020-09-25 11:23:03,004 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 11:23:03,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:23:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 11:23:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-09-25 11:23:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 11:23:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-09-25 11:23:03,025 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 55 [2020-09-25 11:23:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:03,025 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-09-25 11:23:03,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-09-25 11:23:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 11:23:03,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:03,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:03,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:23:03,027 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2117485225, now seen corresponding path program 4 times [2020-09-25 11:23:03,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:03,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629952727] [2020-09-25 11:23:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:03,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:03,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:06,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:06,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 11:23:06,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:06,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-09-25 11:23:06,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:06,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:23:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:06,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 11:23:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:06,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:06,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:06,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:06,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:23:06,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:06,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:06,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:07,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:07,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 11:23:07,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:07,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-09-25 11:23:07,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:07,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:07,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:23:07,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:07,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 11:23:07,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:07,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629952727] [2020-09-25 11:23:07,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:07,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:23:07,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027930762] [2020-09-25 11:23:07,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:23:07,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:23:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:23:07,469 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 15 states. [2020-09-25 11:23:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:07,995 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-09-25 11:23:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:23:07,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-25 11:23:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:07,998 INFO L225 Difference]: With dead ends: 147 [2020-09-25 11:23:07,998 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 11:23:07,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:23:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 11:23:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-25 11:23:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-25 11:23:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-09-25 11:23:08,026 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2020-09-25 11:23:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:08,030 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-09-25 11:23:08,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:23:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-09-25 11:23:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 11:23:08,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:08,035 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:08,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:23:08,035 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1506500773, now seen corresponding path program 5 times [2020-09-25 11:23:08,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:08,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900111026] [2020-09-25 11:23:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4821 [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:12,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:23:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 11:23:12,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:12,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:12,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:12,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:12,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:12,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:23:12,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:12,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:12,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:12,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:12,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:13,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:13,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 11:23:13,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:13,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-09-25 11:23:13,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:13,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:13,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:23:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 11:23:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:13,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900111026] [2020-09-25 11:23:13,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:13,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 11:23:13,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295730916] [2020-09-25 11:23:13,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 11:23:13,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 11:23:13,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:23:13,529 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 17 states. [2020-09-25 11:23:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:14,286 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-09-25 11:23:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 11:23:14,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-09-25 11:23:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:14,288 INFO L225 Difference]: With dead ends: 153 [2020-09-25 11:23:14,288 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 11:23:14,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 11:23:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 11:23:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-09-25 11:23:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 11:23:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-09-25 11:23:14,297 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 67 [2020-09-25 11:23:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:14,298 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-09-25 11:23:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 11:23:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-09-25 11:23:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 11:23:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:14,299 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:14,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:23:14,300 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1728507487, now seen corresponding path program 6 times [2020-09-25 11:23:14,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:14,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643300728] [2020-09-25 11:23:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:15,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4183 [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:18,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:23:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 11:23:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:18,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:18,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:18,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:19,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:19,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 11:23:19,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-09-25 11:23:19,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:19,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:19,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:23:19,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 11:23:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:19,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643300728] [2020-09-25 11:23:19,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:19,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 11:23:19,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138174273] [2020-09-25 11:23:19,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 11:23:19,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 11:23:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:23:19,323 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 19 states. [2020-09-25 11:23:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:20,218 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-25 11:23:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 11:23:20,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-09-25 11:23:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:20,220 INFO L225 Difference]: With dead ends: 159 [2020-09-25 11:23:20,220 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 11:23:20,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 11:23:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 11:23:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-09-25 11:23:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 11:23:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-09-25 11:23:20,229 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 73 [2020-09-25 11:23:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:20,230 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-09-25 11:23:20,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 11:23:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-09-25 11:23:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 11:23:20,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:20,231 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:20,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:23:20,232 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1573197213, now seen corresponding path program 7 times [2020-09-25 11:23:20,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:20,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715352222] [2020-09-25 11:23:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:22,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:25,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:25,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:23:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 11:23:25,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:25,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:25,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:25,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:25,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:25,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:25,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:25,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:25,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:25,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:25,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:25,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:25,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:25,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 11:23:25,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:26,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715352222] [2020-09-25 11:23:26,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:26,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 11:23:26,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619847813] [2020-09-25 11:23:26,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 11:23:26,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 11:23:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:23:26,163 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 21 states. [2020-09-25 11:23:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:27,117 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-09-25 11:23:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 11:23:27,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-09-25 11:23:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:27,119 INFO L225 Difference]: With dead ends: 165 [2020-09-25 11:23:27,119 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 11:23:27,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 11:23:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 11:23:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-09-25 11:23:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 11:23:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-25 11:23:27,128 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 79 [2020-09-25 11:23:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:27,129 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-25 11:23:27,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 11:23:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-25 11:23:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 11:23:27,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:27,130 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:27,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:23:27,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:27,131 INFO L82 PathProgramCache]: Analyzing trace with hash 518335641, now seen corresponding path program 8 times [2020-09-25 11:23:27,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:27,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404636702] [2020-09-25 11:23:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:29,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:32,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:32,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-25 11:23:32,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:32,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 11:23:32,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:32,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 11:23:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:32,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 11:23:32,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:32,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:32,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:32,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:32,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:32,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:32,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:32,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:32,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:32,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 11:23:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 11:23:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 11:23:32,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:23:33,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404636702] [2020-09-25 11:23:33,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:33,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 11:23:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980931396] [2020-09-25 11:23:33,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 11:23:33,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 11:23:33,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-09-25 11:23:33,252 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 23 states. [2020-09-25 11:23:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:34,518 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-09-25 11:23:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 11:23:34,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-09-25 11:23:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:34,520 INFO L225 Difference]: With dead ends: 171 [2020-09-25 11:23:34,520 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 11:23:34,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=656, Invalid=1996, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 11:23:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 11:23:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-09-25 11:23:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-25 11:23:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-09-25 11:23:34,529 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 85 [2020-09-25 11:23:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:34,529 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-09-25 11:23:34,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 11:23:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-09-25 11:23:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 11:23:34,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:34,530 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:34,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:23:34,531 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1673467541, now seen corresponding path program 9 times [2020-09-25 11:23:34,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:34,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884685878] [2020-09-25 11:23:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:37,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:39,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 11:23:39,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:23:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 11:23:39,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:39,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:39,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:39,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:39,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:23:39,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:39,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:39,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:39,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:39,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:39,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:39,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 11:23:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking...