/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:56:48,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:56:48,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:56:48,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:56:48,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:56:48,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:56:48,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:56:48,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:56:48,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:56:48,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:56:48,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:56:48,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:56:48,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:56:48,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:56:48,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:56:48,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:56:48,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:56:48,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:56:48,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:56:48,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:56:48,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:56:48,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:56:48,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:56:48,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:56:48,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:56:48,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:56:48,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:56:48,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:56:48,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:56:48,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:56:48,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:56:48,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:56:48,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:56:48,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:56:48,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:56:48,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:56:48,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:56:48,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:56:48,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:56:48,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:56:48,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:56:48,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 23:56:48,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:56:48,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:56:48,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:56:48,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:56:48,324 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:56:48,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:56:48,324 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:56:48,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:56:48,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:56:48,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:56:48,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:56:48,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:56:48,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:56:48,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:56:48,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:56:48,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:56:48,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:56:48,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:56:48,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:56:48,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:56:48,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:56:48,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:56:48,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:56:48,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:56:48,329 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-14 23:56:48,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:56:48,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:56:48,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:56:48,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:56:48,665 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:56:48,665 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-14 23:56:48,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c23c8fd8/7d55a57aa4e14cd584bc8caa41388791/FLAG6fffd1e37 [2020-10-14 23:56:49,194 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:56:49,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de31.c [2020-10-14 23:56:49,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c23c8fd8/7d55a57aa4e14cd584bc8caa41388791/FLAG6fffd1e37 [2020-10-14 23:56:49,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c23c8fd8/7d55a57aa4e14cd584bc8caa41388791 [2020-10-14 23:56:49,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:56:49,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:56:49,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:49,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:56:49,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:56:49,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92e95d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49, skipping insertion in model container [2020-10-14 23:56:49,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:56:49,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:56:49,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:49,812 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:56:49,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:49,838 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:56:49,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49 WrapperNode [2020-10-14 23:56:49,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:49,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:56:49,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:56:49,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:56:49,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... [2020-10-14 23:56:49,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:56:49,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:56:49,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:56:49,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:56:49,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:56:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:56:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:56:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:56:50,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:56:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:56:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:56:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:56:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:56:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:56:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:56:50,253 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:56:50,254 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 23:56:50,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:50 BoogieIcfgContainer [2020-10-14 23:56:50,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:56:50,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:56:50,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:56:50,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:56:50,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:49" (1/3) ... [2020-10-14 23:56:50,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2632feed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:50, skipping insertion in model container [2020-10-14 23:56:50,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:49" (2/3) ... [2020-10-14 23:56:50,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2632feed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:50, skipping insertion in model container [2020-10-14 23:56:50,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:50" (3/3) ... [2020-10-14 23:56:50,268 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de31.c [2020-10-14 23:56:50,279 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:56:50,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:56:50,309 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:56:50,357 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:56:50,357 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:56:50,357 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:56:50,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:56:50,358 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:56:50,358 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:56:50,358 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:56:50,358 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:56:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 23:56:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:56:50,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:50,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:50,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1939139363, now seen corresponding path program 1 times [2020-10-14 23:56:50,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:50,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747777610] [2020-10-14 23:56:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:56:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-14 23:56:51,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 23:56:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:51,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:51,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:56:51,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:51,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:56:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747777610] [2020-10-14 23:56:51,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:56:51,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:56:51,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306172479] [2020-10-14 23:56:51,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:51,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:51,431 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2020-10-14 23:56:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:51,660 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2020-10-14 23:56:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:56:51,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-14 23:56:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:51,673 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:56:51,673 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 23:56:51,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 23:56:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 23:56:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:56:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-14 23:56:51,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2020-10-14 23:56:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:51,727 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-14 23:56:51,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-14 23:56:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:56:51,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:51,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:51,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:56:51,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 870120472, now seen corresponding path program 1 times [2020-10-14 23:56:51,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:51,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515345328] [2020-10-14 23:56:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:56:51,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:51,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-14 23:56:51,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:56:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:51,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:51,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:52,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:52,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:52,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:52,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:52,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:52,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515345328] [2020-10-14 23:56:52,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:52,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:52,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581435216] [2020-10-14 23:56:52,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:52,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:52,092 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 8 states. [2020-10-14 23:56:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:52,230 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-14 23:56:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:56:52,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-14 23:56:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:52,233 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:56:52,234 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:56:52,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:56:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 23:56:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:56:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-14 23:56:52,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-10-14 23:56:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:52,243 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-14 23:56:52,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-14 23:56:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:56:52,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:52,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:52,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:56:52,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1239468623, now seen corresponding path program 1 times [2020-10-14 23:56:52,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:52,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179920102] [2020-10-14 23:56:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:56:52,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:52,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-14 23:56:52,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:56:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:52,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:52,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:52,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:56:52,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:52,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:52,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179920102] [2020-10-14 23:56:52,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:52,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:56:52,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132995647] [2020-10-14 23:56:52,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:56:52,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:52,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:56:52,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:52,767 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 9 states. [2020-10-14 23:56:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:52,928 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-10-14 23:56:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:56:52,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-14 23:56:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:52,931 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:56:52,931 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:56:52,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:56:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-14 23:56:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:56:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-10-14 23:56:52,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2020-10-14 23:56:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:52,948 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-10-14 23:56:52,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:56:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-10-14 23:56:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:56:52,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:52,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:52,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:56:52,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1652670274, now seen corresponding path program 1 times [2020-10-14 23:56:52,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:52,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609424205] [2020-10-14 23:56:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:56:53,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:56:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 23:56:53,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:56:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:56:53,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:53,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:53,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:53,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:56:53,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609424205] [2020-10-14 23:56:53,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:53,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:56:53,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201651996] [2020-10-14 23:56:53,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:56:53,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:56:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:56:53,174 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 4 states. [2020-10-14 23:56:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:53,204 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-14 23:56:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:56:53,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 23:56:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:53,205 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:56:53,205 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 23:56:53,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:56:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 23:56:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-14 23:56:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:56:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-14 23:56:53,214 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2020-10-14 23:56:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:53,214 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-14 23:56:53,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:56:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-14 23:56:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:56:53,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:53,216 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:53,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:56:53,216 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash -195640584, now seen corresponding path program 2 times [2020-10-14 23:56:53,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:53,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016577157] [2020-10-14 23:56:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:56:53,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:53,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-14 23:56:53,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:56:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:56:53,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:53,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:53,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:53,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:53,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:53,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016577157] [2020-10-14 23:56:53,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:53,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:56:53,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599227158] [2020-10-14 23:56:53,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:56:53,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:56:53,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:53,425 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-10-14 23:56:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:53,452 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-14 23:56:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:56:53,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:56:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:53,453 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:56:53,453 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:56:53,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:56:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 23:56:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 23:56:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-14 23:56:53,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 16 [2020-10-14 23:56:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:53,459 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-14 23:56:53,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:56:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-14 23:56:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:56:53,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:53,460 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:53,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:56:53,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash -596259126, now seen corresponding path program 3 times [2020-10-14 23:56:53,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:53,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192397857] [2020-10-14 23:56:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:56:53,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:53,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 23:56:53,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:56:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:56:53,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:53,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:53,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:53,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:53,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192397857] [2020-10-14 23:56:53,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:53,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:56:53,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293332176] [2020-10-14 23:56:53,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:56:53,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:56:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:53,681 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-10-14 23:56:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:53,727 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-14 23:56:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:56:53,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:56:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:53,730 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:56:53,730 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:56:53,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:56:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-14 23:56:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:56:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-14 23:56:53,738 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 16 [2020-10-14 23:56:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:53,739 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-14 23:56:53,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:56:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-14 23:56:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:53,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:53,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:53,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:56:53,740 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1268625955, now seen corresponding path program 4 times [2020-10-14 23:56:53,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:53,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529258866] [2020-10-14 23:56:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-14 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:56:53,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:54,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:54,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:54,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:54,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:54,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:54,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:54,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:54,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529258866] [2020-10-14 23:56:54,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:54,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:54,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938426832] [2020-10-14 23:56:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:54,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:54,325 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 11 states. [2020-10-14 23:56:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:54,786 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-14 23:56:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:56:54,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-14 23:56:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:54,788 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:56:54,788 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:56:54,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:56:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:56:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:56:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:56:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-10-14 23:56:54,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2020-10-14 23:56:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:54,794 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-10-14 23:56:54,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-10-14 23:56:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:54,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:54,795 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:54,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:56:54,796 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1669244497, now seen corresponding path program 5 times [2020-10-14 23:56:54,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:54,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819891821] [2020-10-14 23:56:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:54,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:54,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-14 23:56:54,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:54,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:55,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:55,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:55,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:55,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:55,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:55,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:55,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:55,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:55,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:55,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819891821] [2020-10-14 23:56:55,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:55,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:56:55,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429321435] [2020-10-14 23:56:55,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:55,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:55,082 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2020-10-14 23:56:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:55,150 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-14 23:56:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:56:55,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-14 23:56:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:55,151 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:56:55,151 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:56:55,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:56:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-14 23:56:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:56:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-14 23:56:55,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2020-10-14 23:56:55,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:55,159 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-14 23:56:55,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-14 23:56:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:56:55,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:55,160 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:55,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:56:55,160 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -572052630, now seen corresponding path program 6 times [2020-10-14 23:56:55,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:55,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592624442] [2020-10-14 23:56:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:55,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:56:55,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-14 23:56:55,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:56:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:55,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:55,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:55,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:55,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:55,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:55,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:55,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:55,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:55,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:55,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:55,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592624442] [2020-10-14 23:56:55,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:55,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:55,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946896065] [2020-10-14 23:56:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:55,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:55,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:55,590 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 8 states. [2020-10-14 23:56:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:55,707 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-14 23:56:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:56:55,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-14 23:56:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:55,710 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:56:55,710 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:56:55,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:56:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-14 23:56:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:56:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-10-14 23:56:55,727 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 18 [2020-10-14 23:56:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:55,727 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-10-14 23:56:55,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-10-14 23:56:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:55,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:55,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:55,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:56:55,733 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash -983951665, now seen corresponding path program 7 times [2020-10-14 23:56:55,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:55,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744027172] [2020-10-14 23:56:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:56,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:56,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:56:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-14 23:56:56,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:56,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:56,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:56,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:56:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:58,520 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-10-14 23:56:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:58,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:58,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:58,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:58,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:58,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:58,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:58,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:58,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:58,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744027172] [2020-10-14 23:56:58,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:58,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:56:58,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131478351] [2020-10-14 23:56:58,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:56:58,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:58,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:56:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:58,787 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 13 states. [2020-10-14 23:57:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:15,302 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-14 23:57:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:57:15,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-14 23:57:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:15,304 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:57:15,304 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:57:15,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=171, Invalid=1231, Unknown=4, NotChecked=0, Total=1406 [2020-10-14 23:57:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:57:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 23:57:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:57:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-14 23:57:15,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2020-10-14 23:57:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:15,312 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-14 23:57:15,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-14 23:57:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:57:15,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:15,313 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:15,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:57:15,314 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash -918843121, now seen corresponding path program 8 times [2020-10-14 23:57:15,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:15,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38013765] [2020-10-14 23:57:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:15,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:57:15,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:15,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-14 23:57:15,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:15,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:15,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:15,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:15,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:57:15,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:15,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:15,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:15,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:15,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:15,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:15,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38013765] [2020-10-14 23:57:15,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:15,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:15,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422166693] [2020-10-14 23:57:15,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:15,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:15,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:15,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:15,771 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2020-10-14 23:57:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:15,928 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-10-14 23:57:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:57:15,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-14 23:57:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:15,930 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:57:15,930 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 23:57:15,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 23:57:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-14 23:57:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:57:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-14 23:57:15,945 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2020-10-14 23:57:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:15,945 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-14 23:57:15,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-14 23:57:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:57:15,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:15,950 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:15,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:57:15,951 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1215553546, now seen corresponding path program 9 times [2020-10-14 23:57:15,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:15,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669880316] [2020-10-14 23:57:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:15,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:16,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:57:16,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:16,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-14 23:57:16,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:16,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:16,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:57:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:57:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:16,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:16,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:16,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:16,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:16,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:16,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:16,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669880316] [2020-10-14 23:57:16,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:16,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:57:16,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490432833] [2020-10-14 23:57:16,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:57:16,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:16,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:57:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:16,561 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-10-14 23:57:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:16,737 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-14 23:57:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:57:16,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-14 23:57:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:16,739 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:57:16,739 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:57:16,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:57:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-10-14 23:57:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-10-14 23:57:16,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2020-10-14 23:57:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:16,747 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-10-14 23:57:16,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:57:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-10-14 23:57:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:57:16,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:16,748 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:16,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:57:16,749 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1339594461, now seen corresponding path program 10 times [2020-10-14 23:57:16,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:16,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38886970] [2020-10-14 23:57:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:17,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:17,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:57:17,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-14 23:57:17,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:17,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:17,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:18,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:18,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:18,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:18,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:18,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:18,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:18,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:18,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:18,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:18,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:18,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38886970] [2020-10-14 23:57:18,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:18,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:18,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915873150] [2020-10-14 23:57:18,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:18,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:18,044 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 15 states. [2020-10-14 23:57:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:20,192 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-14 23:57:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:57:20,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-10-14 23:57:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:20,194 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:57:20,194 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:57:20,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:57:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:57:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 23:57:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:57:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 23:57:20,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2020-10-14 23:57:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:20,202 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 23:57:20,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 23:57:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:57:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:20,203 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:20,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:57:20,203 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1337626513, now seen corresponding path program 11 times [2020-10-14 23:57:20,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:20,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417344541] [2020-10-14 23:57:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:57:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:20,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-14 23:57:20,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:20,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:57:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:20,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:20,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:20,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:20,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:20,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:20,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:20,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:20,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:20,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:20,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417344541] [2020-10-14 23:57:20,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:20,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:57:20,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846771385] [2020-10-14 23:57:20,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:57:20,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:20,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:57:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:20,956 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 11 states. [2020-10-14 23:57:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:21,111 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-14 23:57:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:57:21,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-14 23:57:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:21,113 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:57:21,113 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:57:21,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:57:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-10-14 23:57:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 23:57:21,131 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 21 [2020-10-14 23:57:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:21,131 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 23:57:21,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:57:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 23:57:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:21,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:21,134 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:21,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:57:21,134 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:21,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1118170282, now seen corresponding path program 12 times [2020-10-14 23:57:21,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:21,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182561302] [2020-10-14 23:57:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:21,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:21,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:21,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-14 23:57:21,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:21,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:57:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:21,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:21,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:21,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:21,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:21,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:21,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:21,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:21,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:21,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:21,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:21,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182561302] [2020-10-14 23:57:21,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:21,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:57:21,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583249125] [2020-10-14 23:57:21,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:57:21,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:57:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:21,834 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 12 states. [2020-10-14 23:57:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:22,029 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-10-14 23:57:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:57:22,030 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-14 23:57:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:22,032 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:57:22,032 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:57:22,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:57:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-10-14 23:57:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:57:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-14 23:57:22,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 22 [2020-10-14 23:57:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:22,041 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-14 23:57:22,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:57:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-14 23:57:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:22,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:22,042 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:22,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:57:22,042 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash -61540401, now seen corresponding path program 13 times [2020-10-14 23:57:22,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:22,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830949414] [2020-10-14 23:57:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:22,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:22,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:22,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-14 23:57:22,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:22,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:22,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:57:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:22,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:22,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:23,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:23,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:23,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:23,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:23,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:23,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830949414] [2020-10-14 23:57:23,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:23,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:57:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330166987] [2020-10-14 23:57:23,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:57:23,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:57:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:23,155 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 13 states. [2020-10-14 23:57:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:23,386 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-14 23:57:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:57:23,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-14 23:57:23,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:23,388 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:57:23,389 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:57:23,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:57:23,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-10-14 23:57:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:57:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-10-14 23:57:23,397 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 23 [2020-10-14 23:57:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:23,397 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-10-14 23:57:23,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-10-14 23:57:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:23,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:23,398 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:23,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:57:23,398 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash -70299415, now seen corresponding path program 1 times [2020-10-14 23:57:23,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:23,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294496620] [2020-10-14 23:57:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:24,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-14 23:57:24,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:24,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:57:24,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:24,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:24,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:24,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:24,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294496620] [2020-10-14 23:57:24,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:24,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:24,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102825502] [2020-10-14 23:57:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:24,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:24,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:24,680 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 17 states. [2020-10-14 23:57:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:45,919 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2020-10-14 23:57:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 23:57:45,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-14 23:57:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:45,920 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:57:45,920 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:57:45,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=293, Invalid=3243, Unknown=4, NotChecked=0, Total=3540 [2020-10-14 23:57:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:57:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-14 23:57:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:57:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-14 23:57:45,928 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 24 [2020-10-14 23:57:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:45,929 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-14 23:57:45,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-14 23:57:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:45,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:45,929 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:45,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:57:45,930 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2022134090, now seen corresponding path program 14 times [2020-10-14 23:57:45,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:45,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277774864] [2020-10-14 23:57:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:46,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:46,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:46,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:46,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:46,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 810 [2020-10-14 23:57:46,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:46,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:46,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:46,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:46,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:46,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:46,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:46,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277774864] [2020-10-14 23:57:46,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:46,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:46,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587984252] [2020-10-14 23:57:46,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:46,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:46,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:46,971 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 14 states. [2020-10-14 23:57:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:47,307 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2020-10-14 23:57:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:57:47,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-14 23:57:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:47,309 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:57:47,309 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 23:57:47,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 23:57:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-14 23:57:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:57:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-10-14 23:57:47,322 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 24 [2020-10-14 23:57:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:47,323 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-10-14 23:57:47,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-10-14 23:57:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:47,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:47,325 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:47,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:57:47,326 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2103433425, now seen corresponding path program 15 times [2020-10-14 23:57:47,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:47,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255198688] [2020-10-14 23:57:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:47,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:47,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:48,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:48,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-14 23:57:48,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:48,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:48,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:48,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:48,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:48,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:48,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:48,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255198688] [2020-10-14 23:57:48,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:48,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:48,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362668021] [2020-10-14 23:57:48,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:48,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:48,600 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 15 states. [2020-10-14 23:57:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:49,075 INFO L93 Difference]: Finished difference Result 80 states and 112 transitions. [2020-10-14 23:57:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:57:49,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-14 23:57:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:49,077 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:57:49,077 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:57:49,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:57:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2020-10-14 23:57:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:57:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-10-14 23:57:49,088 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 25 [2020-10-14 23:57:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:49,089 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-14 23:57:49,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-10-14 23:57:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:49,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:49,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:49,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:57:49,091 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1187318183, now seen corresponding path program 2 times [2020-10-14 23:57:49,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:49,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574825463] [2020-10-14 23:57:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:50,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:50,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:50,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:50,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-14 23:57:50,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:50,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:50,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:57:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:50,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:50,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:50,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:50,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:50,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:50,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:50,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:50,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:50,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:50,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:50,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:50,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574825463] [2020-10-14 23:57:50,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:50,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:50,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814401670] [2020-10-14 23:57:50,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:50,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:50,860 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 19 states. [2020-10-14 23:58:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:20,827 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2020-10-14 23:58:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 23:58:20,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-14 23:58:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:20,828 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:58:20,828 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:58:20,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=389, Invalid=5308, Unknown=3, NotChecked=0, Total=5700 [2020-10-14 23:58:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:58:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 23:58:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:58:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-10-14 23:58:20,836 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 26 [2020-10-14 23:58:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:20,836 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-10-14 23:58:20,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:58:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-10-14 23:58:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:20,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:20,837 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:20,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:58:20,837 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:20,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:20,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1147007510, now seen corresponding path program 16 times [2020-10-14 23:58:20,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:20,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250204139] [2020-10-14 23:58:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:20,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:21,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:21,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1069 [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:58:21,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:22,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:22,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:22,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:22,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250204139] [2020-10-14 23:58:22,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:22,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:22,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173523871] [2020-10-14 23:58:22,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:22,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:22,181 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 16 states. [2020-10-14 23:58:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:22,650 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-10-14 23:58:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:58:22,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-14 23:58:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:22,652 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:58:22,652 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:58:22,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:58:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2020-10-14 23:58:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:58:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2020-10-14 23:58:22,664 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 26 [2020-10-14 23:58:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:22,664 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2020-10-14 23:58:22,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2020-10-14 23:58:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:22,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:22,665 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:22,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:58:22,668 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 661995471, now seen corresponding path program 17 times [2020-10-14 23:58:22,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:22,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736701295] [2020-10-14 23:58:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:22,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:23,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:23,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:23,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:23,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-14 23:58:23,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:23,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:23,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:23,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:23,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:58:23,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:27,877 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-14 23:58:30,026 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-10-14 23:58:30,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:30,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:30,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:30,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736701295] [2020-10-14 23:58:30,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:30,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:30,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305972282] [2020-10-14 23:58:30,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:30,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:30,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:30,595 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand 21 states. [2020-10-14 23:58:43,197 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 23:58:57,590 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-14 23:59:06,595 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-10-14 23:59:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:12,987 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-10-14 23:59:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-14 23:59:12,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-10-14 23:59:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:12,988 INFO L225 Difference]: With dead ends: 149 [2020-10-14 23:59:12,988 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:59:12,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=555, Invalid=9747, Unknown=0, NotChecked=0, Total=10302 [2020-10-14 23:59:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:59:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 23:59:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-10-14 23:59:12,998 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 27 [2020-10-14 23:59:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:12,998 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-10-14 23:59:12,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:59:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-10-14 23:59:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:59:12,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:12,999 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:12,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:59:12,999 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:13,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1562575217, now seen corresponding path program 18 times [2020-10-14 23:59:13,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:13,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097728759] [2020-10-14 23:59:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:13,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:59:14,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:14,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:14,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:14,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:14,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:14,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:14,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097728759] [2020-10-14 23:59:14,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:14,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:59:14,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948975602] [2020-10-14 23:59:14,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:59:14,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:59:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:14,585 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 17 states. [2020-10-14 23:59:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:15,053 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2020-10-14 23:59:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:59:15,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-14 23:59:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:15,055 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:59:15,055 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:59:15,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:59:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2020-10-14 23:59:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 23:59:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-10-14 23:59:15,067 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 27 [2020-10-14 23:59:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:15,067 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-10-14 23:59:15,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:59:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-10-14 23:59:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:15,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:15,068 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:15,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:59:15,069 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1560272246, now seen corresponding path program 19 times [2020-10-14 23:59:15,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:15,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661291220] [2020-10-14 23:59:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:15,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:59:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:16,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:16,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:16,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:59:16,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661291220] [2020-10-14 23:59:16,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:16,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:59:16,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096377283] [2020-10-14 23:59:16,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:59:16,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:59:16,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:16,488 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 18 states. [2020-10-14 23:59:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:17,054 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2020-10-14 23:59:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:17,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-14 23:59:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:17,056 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:59:17,057 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:59:17,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:59:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-14 23:59:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:59:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-10-14 23:59:17,063 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 28 [2020-10-14 23:59:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:17,063 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-10-14 23:59:17,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:59:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-10-14 23:59:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:59:17,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:17,064 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:17,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:59:17,064 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash -846047011, now seen corresponding path program 20 times [2020-10-14 23:59:17,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:17,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365723070] [2020-10-14 23:59:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:17,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:59:17,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:59:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-14 23:59:17,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:17,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:59:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:59:17,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:20,394 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-10-14 23:59:21,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:21,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:21,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365723070] [2020-10-14 23:59:21,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:21,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:59:21,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814288853] [2020-10-14 23:59:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:59:21,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:59:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:21,224 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 23 states. [2020-10-14 23:59:24,024 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2020-10-14 23:59:34,446 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2020-10-15 00:00:09,144 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-15 00:00:28,560 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-15 00:00:51,427 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 24