/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:12:31,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:12:31,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:12:31,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:12:31,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:12:31,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:12:31,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:12:31,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:12:31,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:12:31,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:12:31,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:12:31,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:12:31,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:12:31,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:12:31,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:12:31,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:12:31,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:12:31,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:12:31,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:12:31,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:12:31,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:12:31,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:12:31,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:12:31,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:12:31,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:12:31,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:12:31,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:12:31,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:12:31,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:12:31,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:12:31,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:12:31,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:12:31,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:12:31,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:12:31,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:12:31,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:12:31,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:12:31,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:12:31,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:12:31,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:12:31,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:12:31,313 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 [2020-10-15 00:12:31,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:12:31,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:12:31,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:12:31,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:12:31,353 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:12:31,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:12:31,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:12:31,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:12:31,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:12:31,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:12:31,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:12:31,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:12:31,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:12:31,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:12:31,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:12:31,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:12:31,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:12:31,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:12:31,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:12:31,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:12:31,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:12:31,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:12:31,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:12:31,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:12:31,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:12:31,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:12:31,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:12:31,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:12:31,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:12:31,359 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; [2020-10-15 00:12:31,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:12:31,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:12:31,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:12:31,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:12:31,679 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:12:31,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2020-10-15 00:12:31,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5da0b37f9/93d77318ad6144eb806a0768f960637b/FLAG004df0ed9 [2020-10-15 00:12:32,168 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:12:32,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-2.i [2020-10-15 00:12:32,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5da0b37f9/93d77318ad6144eb806a0768f960637b/FLAG004df0ed9 [2020-10-15 00:12:32,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5da0b37f9/93d77318ad6144eb806a0768f960637b [2020-10-15 00:12:32,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:12:32,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:12:32,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:12:32,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:12:32,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:12:32,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1d4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32, skipping insertion in model container [2020-10-15 00:12:32,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:12:32,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:12:32,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:12:32,764 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:12:32,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:12:32,894 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:12:32,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32 WrapperNode [2020-10-15 00:12:32,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:12:32,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:12:32,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:12:32,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:12:32,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (1/1) ... [2020-10-15 00:12:32,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:12:32,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:12:32,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:12:32,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:12:32,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (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 [2020-10-15 00:12:32,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:12:32,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:12:32,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:12:32,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:12:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:12:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:12:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 00:12:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:12:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:12:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:12:33,317 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:12:33,318 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 00:12:33,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:12:33 BoogieIcfgContainer [2020-10-15 00:12:33,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:12:33,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:12:33,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:12:33,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:12:33,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:12:32" (1/3) ... [2020-10-15 00:12:33,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7a07ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:12:33, skipping insertion in model container [2020-10-15 00:12:33,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:32" (2/3) ... [2020-10-15 00:12:33,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7a07ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:12:33, skipping insertion in model container [2020-10-15 00:12:33,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:12:33" (3/3) ... [2020-10-15 00:12:33,330 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2020-10-15 00:12:33,341 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:12:33,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:12:33,361 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:12:33,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:12:33,387 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:12:33,387 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:12:33,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:12:33,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:12:33,388 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:12:33,388 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:12:33,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:12:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-15 00:12:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 00:12:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:33,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:33,415 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash 907546272, now seen corresponding path program 1 times [2020-10-15 00:12:33,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:33,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173787159] [2020-10-15 00:12:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:33,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:33,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:34,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 00:12:34,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:12:34,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-15 00:12:34,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:34,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:12:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:12:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:12:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:12:34,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:34,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:34,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:34,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 00:12:34,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:34,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:34,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:34,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:34,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:34,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:12:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:34,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173787159] [2020-10-15 00:12:34,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:12:34,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 00:12:34,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312305451] [2020-10-15 00:12:34,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:12:34,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:12:34,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:12:34,409 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2020-10-15 00:12:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:34,699 INFO L93 Difference]: Finished difference Result 94 states and 140 transitions. [2020-10-15 00:12:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:12:34,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-15 00:12:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:34,711 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:12:34,711 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 00:12:34,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:12:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 00:12:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-15 00:12:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:12:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-15 00:12:34,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2020-10-15 00:12:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:34,760 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-15 00:12:34,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:12:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-15 00:12:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:12:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:34,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:34,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:12:34,763 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1254487, now seen corresponding path program 1 times [2020-10-15 00:12:34,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:34,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888625057] [2020-10-15 00:12:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:34,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:34,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:35,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:36,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:36,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:12:36,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:12:36,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-15 00:12:36,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:36,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:12:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:36,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:12:36,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:37,010 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 51 [2020-10-15 00:12:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:37,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:37,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:37,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:37,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:37,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:37,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:37,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:37,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:37,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:37,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888625057] [2020-10-15 00:12:37,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:37,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:12:37,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772562901] [2020-10-15 00:12:37,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:12:37,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:12:37,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:12:37,260 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 10 states. [2020-10-15 00:12:37,572 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-15 00:12:37,711 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-15 00:12:37,903 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-10-15 00:12:38,136 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-15 00:12:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:38,216 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2020-10-15 00:12:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:12:38,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-15 00:12:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:38,218 INFO L225 Difference]: With dead ends: 118 [2020-10-15 00:12:38,219 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:12:38,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:12:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:12:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2020-10-15 00:12:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 00:12:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-15 00:12:38,232 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 25 [2020-10-15 00:12:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:38,233 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-15 00:12:38,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:12:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-15 00:12:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:12:38,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:38,234 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:38,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:12:38,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash 322541692, now seen corresponding path program 1 times [2020-10-15 00:12:38,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:38,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631354176] [2020-10-15 00:12:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:38,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:38,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:42,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:12:42,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:12:42,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4110 [2020-10-15 00:12:42,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:42,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:12:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:42,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:12:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:42,784 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 74 [2020-10-15 00:12:42,910 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-15 00:12:43,091 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 71 [2020-10-15 00:12:43,633 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 73 [2020-10-15 00:12:43,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:43,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:43,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:43,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:43,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:43,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:43,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:43,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631354176] [2020-10-15 00:12:43,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:43,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:12:43,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57919027] [2020-10-15 00:12:43,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:12:43,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:12:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:12:43,693 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 10 states. [2020-10-15 00:12:44,011 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2020-10-15 00:12:44,145 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-15 00:12:44,292 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2020-10-15 00:12:44,512 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-15 00:12:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:44,665 INFO L93 Difference]: Finished difference Result 161 states and 222 transitions. [2020-10-15 00:12:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:12:44,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-15 00:12:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:44,668 INFO L225 Difference]: With dead ends: 161 [2020-10-15 00:12:44,668 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 00:12:44,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:12:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 00:12:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2020-10-15 00:12:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:12:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-15 00:12:44,707 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 28 [2020-10-15 00:12:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:44,708 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-15 00:12:44,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:12:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-15 00:12:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:12:44,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:44,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:44,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:12:44,712 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:44,714 INFO L82 PathProgramCache]: Analyzing trace with hash -658014079, now seen corresponding path program 1 times [2020-10-15 00:12:44,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:44,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826615336] [2020-10-15 00:12:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:44,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:45,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:47,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:47,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:12:47,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:12:47,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3067 [2020-10-15 00:12:47,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:47,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:12:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:12:47,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-15 00:12:48,001 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-15 00:12:48,122 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-15 00:12:48,655 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 97 [2020-10-15 00:12:48,827 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2020-10-15 00:12:49,055 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 76 [2020-10-15 00:12:49,627 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 116 [2020-10-15 00:12:49,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:49,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:49,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:49,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:49,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:49,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:12:49,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:49,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:49,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:49,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:12:49,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826615336] [2020-10-15 00:12:49,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:49,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:12:49,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529886673] [2020-10-15 00:12:49,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:12:49,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:12:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:12:49,702 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 12 states. [2020-10-15 00:12:50,097 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 119 [2020-10-15 00:12:50,439 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 114 [2020-10-15 00:12:50,814 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2020-10-15 00:12:51,084 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 74 [2020-10-15 00:12:51,866 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 145 [2020-10-15 00:12:52,788 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 149 [2020-10-15 00:12:52,983 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2020-10-15 00:12:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:53,246 INFO L93 Difference]: Finished difference Result 183 states and 248 transitions. [2020-10-15 00:12:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:12:53,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-15 00:12:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:53,248 INFO L225 Difference]: With dead ends: 183 [2020-10-15 00:12:53,249 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 00:12:53,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:12:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 00:12:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 71. [2020-10-15 00:12:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:12:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-10-15 00:12:53,280 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 30 [2020-10-15 00:12:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:53,281 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-10-15 00:12:53,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:12:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-10-15 00:12:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:12:53,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:53,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:53,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:12:53,289 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash -410031266, now seen corresponding path program 2 times [2020-10-15 00:12:53,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:53,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648241490] [2020-10-15 00:12:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:53,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:12:56,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:12:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3407 [2020-10-15 00:12:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:56,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:12:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:12:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:12:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:12:57,112 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2020-10-15 00:12:57,617 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 71 [2020-10-15 00:12:57,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:57,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:57,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:57,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:12:57,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:57,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:57,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:57,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:57,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:57,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:57,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:12:57,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648241490] [2020-10-15 00:12:57,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:12:57,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 00:12:57,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743069707] [2020-10-15 00:12:57,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:12:57,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:12:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:12:57,671 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 9 states. [2020-10-15 00:12:57,853 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-15 00:12:58,087 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-15 00:12:58,339 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-15 00:12:58,625 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-15 00:12:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:58,742 INFO L93 Difference]: Finished difference Result 141 states and 189 transitions. [2020-10-15 00:12:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:12:58,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-15 00:12:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:58,743 INFO L225 Difference]: With dead ends: 141 [2020-10-15 00:12:58,743 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 00:12:58,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:12:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 00:12:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-10-15 00:12:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:12:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2020-10-15 00:12:58,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 30 [2020-10-15 00:12:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:58,765 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2020-10-15 00:12:58,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:12:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2020-10-15 00:12:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:12:58,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:58,766 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:58,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:12:58,767 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1813245878, now seen corresponding path program 3 times [2020-10-15 00:12:58,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:58,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55902729] [2020-10-15 00:12:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:58,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:00,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:00,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:13:00,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:13:00,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2155 [2020-10-15 00:13:00,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:00,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:13:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:13:00,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:13:00,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:01,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:01,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:01,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:01,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:13:01,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:01,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:01,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:01,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:01,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:13:01,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55902729] [2020-10-15 00:13:01,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:13:01,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 00:13:01,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25643966] [2020-10-15 00:13:01,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:13:01,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:13:01,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:13:01,084 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand 8 states. [2020-10-15 00:13:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:01,345 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2020-10-15 00:13:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:13:01,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-15 00:13:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:01,347 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:13:01,347 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 00:13:01,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:13:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 00:13:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-15 00:13:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:13:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-10-15 00:13:01,377 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 32 [2020-10-15 00:13:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:01,378 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-10-15 00:13:01,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:13:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-10-15 00:13:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:13:01,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:01,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:01,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:13:01,382 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2031576964, now seen corresponding path program 1 times [2020-10-15 00:13:01,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:01,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294764605] [2020-10-15 00:13:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:01,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:06,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:13:06,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:13:06,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:13:06,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:06,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:06,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:13:06,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:13:06,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:13:06,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:06,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:06,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:06,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:06,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:06,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:06,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:13:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 00:13:06,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294764605] [2020-10-15 00:13:06,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:06,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:13:06,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53405238] [2020-10-15 00:13:06,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:13:06,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:06,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:13:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:13:06,572 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 8 states. [2020-10-15 00:13:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:06,821 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2020-10-15 00:13:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:13:06,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-15 00:13:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:06,822 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:13:06,822 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 00:13:06,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:13:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 00:13:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2020-10-15 00:13:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:13:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-15 00:13:06,841 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 32 [2020-10-15 00:13:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:06,841 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-15 00:13:06,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:13:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-15 00:13:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:13:06,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:06,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:06,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:13:06,843 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -285990173, now seen corresponding path program 2 times [2020-10-15 00:13:06,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:06,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543882321] [2020-10-15 00:13:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:06,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:07,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:10,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:10,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:13:10,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:13:10,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3250 [2020-10-15 00:13:10,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:10,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:10,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:13:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:10,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:13:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:13:10,325 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-15 00:13:10,625 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2020-10-15 00:13:10,891 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2020-10-15 00:13:11,184 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 75 [2020-10-15 00:13:11,677 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 73 [2020-10-15 00:13:11,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:11,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:11,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:11,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:11,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:11,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:11,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:11,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:11,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:11,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:11,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:11,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 00:13:11,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543882321] [2020-10-15 00:13:11,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:11,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:13:11,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162061570] [2020-10-15 00:13:11,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:13:11,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:13:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:13:11,739 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 11 states. [2020-10-15 00:13:11,969 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-15 00:13:12,190 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-15 00:13:12,415 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-10-15 00:13:12,679 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 89 [2020-10-15 00:13:12,979 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-15 00:13:13,314 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-15 00:13:13,586 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 93 [2020-10-15 00:13:13,779 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-15 00:13:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:13,928 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2020-10-15 00:13:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:13:13,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-15 00:13:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:13,931 INFO L225 Difference]: With dead ends: 111 [2020-10-15 00:13:13,931 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:13:13,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:13:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:13:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 53. [2020-10-15 00:13:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 00:13:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-10-15 00:13:13,947 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 32 [2020-10-15 00:13:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:13,948 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-10-15 00:13:13,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:13:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-10-15 00:13:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:13:13,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:13,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:13,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:13:13,949 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:13,949 INFO L82 PathProgramCache]: Analyzing trace with hash -614932140, now seen corresponding path program 1 times [2020-10-15 00:13:13,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:13,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232876429] [2020-10-15 00:13:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:13,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:13:14,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:14,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:14,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:13:14,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232876429] [2020-10-15 00:13:14,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:14,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:13:14,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831719335] [2020-10-15 00:13:14,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:13:14,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:13:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:13:14,250 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 5 states. [2020-10-15 00:13:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:14,396 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2020-10-15 00:13:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:13:14,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-15 00:13:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:14,397 INFO L225 Difference]: With dead ends: 143 [2020-10-15 00:13:14,398 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 00:13:14,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:13:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 00:13:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 55. [2020-10-15 00:13:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:13:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-15 00:13:14,415 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 33 [2020-10-15 00:13:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:14,415 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-15 00:13:14,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:13:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-15 00:13:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:13:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:14,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:14,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:13:14,416 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1333627826, now seen corresponding path program 2 times [2020-10-15 00:13:14,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:14,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085083574] [2020-10-15 00:13:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:13:14,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:14,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:14,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:14,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:14,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:13:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 00:13:14,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085083574] [2020-10-15 00:13:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:14,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:13:14,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771016519] [2020-10-15 00:13:14,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:13:14,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:14,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:13:14,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:13:14,807 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 5 states. [2020-10-15 00:13:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:14,917 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2020-10-15 00:13:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:13:14,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-15 00:13:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:14,919 INFO L225 Difference]: With dead ends: 116 [2020-10-15 00:13:14,920 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 00:13:14,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:13:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 00:13:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-15 00:13:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:13:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2020-10-15 00:13:14,943 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 35 [2020-10-15 00:13:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:14,943 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2020-10-15 00:13:14,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:13:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2020-10-15 00:13:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:13:14,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:14,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:14,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:13:14,944 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -986618081, now seen corresponding path program 1 times [2020-10-15 00:13:14,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:14,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439381547] [2020-10-15 00:13:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:15,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:16,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:18,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:18,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:19,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:19,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:13:19,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 00:13:19,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 00:13:19,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:19,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:13:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:19,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:13:19,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:13:21,331 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 395 DAG size of output: 134 [2020-10-15 00:13:22,804 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 424 DAG size of output: 163 [2020-10-15 00:13:24,239 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 370 DAG size of output: 60 [2020-10-15 00:13:24,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:24,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:24,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:24,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:24,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:13:24,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439381547] [2020-10-15 00:13:24,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:24,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:13:24,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751325930] [2020-10-15 00:13:24,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:13:24,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:13:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:13:24,319 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 8 states. [2020-10-15 00:13:24,963 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 150 [2020-10-15 00:13:25,196 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2020-10-15 00:13:25,795 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2020-10-15 00:13:26,360 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 158 [2020-10-15 00:13:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:26,445 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-15 00:13:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:13:26,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-10-15 00:13:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:26,447 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:13:26,448 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 00:13:26,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:13:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 00:13:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-15 00:13:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 00:13:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-10-15 00:13:26,473 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 44 [2020-10-15 00:13:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:26,474 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-10-15 00:13:26,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:13:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-10-15 00:13:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 00:13:26,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:26,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:26,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:13:26,476 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1379645091, now seen corresponding path program 1 times [2020-10-15 00:13:26,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:26,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046074082] [2020-10-15 00:13:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:26,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:26,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:27,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:28,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:28,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:29,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:29,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:31,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:31,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-15 00:13:31,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 00:13:31,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:13:31,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:31,801 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 79 [2020-10-15 00:13:31,956 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-15 00:13:32,194 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-15 00:13:32,378 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-15 00:13:32,704 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 89 [2020-10-15 00:13:33,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:33,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:33,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:33,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:33,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:33,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:33,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:33,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:33,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:33,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:33,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:13:33,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046074082] [2020-10-15 00:13:33,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:33,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:13:33,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10159100] [2020-10-15 00:13:33,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:13:33,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:13:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:13:33,266 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 15 states. [2020-10-15 00:13:33,547 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-15 00:13:33,776 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-15 00:13:34,042 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 103 [2020-10-15 00:13:34,293 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-10-15 00:13:34,532 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2020-10-15 00:13:34,731 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2020-10-15 00:13:35,049 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 105 [2020-10-15 00:13:35,373 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-10-15 00:13:35,660 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2020-10-15 00:13:40,196 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2020-10-15 00:13:40,468 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-15 00:13:40,786 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-10-15 00:13:41,011 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-15 00:13:41,349 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-10-15 00:13:41,654 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-10-15 00:13:41,954 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-15 00:13:46,630 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-15 00:13:46,978 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2020-10-15 00:13:47,317 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 101 [2020-10-15 00:13:47,570 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-15 00:13:47,883 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-10-15 00:13:48,126 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-15 00:13:48,450 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-10-15 00:13:48,773 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-15 00:13:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:48,781 INFO L93 Difference]: Finished difference Result 219 states and 286 transitions. [2020-10-15 00:13:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:13:48,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-15 00:13:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:48,783 INFO L225 Difference]: With dead ends: 219 [2020-10-15 00:13:48,783 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 00:13:48,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=464, Invalid=1257, Unknown=1, NotChecked=0, Total=1722 [2020-10-15 00:13:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 00:13:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 124. [2020-10-15 00:13:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 00:13:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2020-10-15 00:13:48,824 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 44 [2020-10-15 00:13:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:48,824 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2020-10-15 00:13:48,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:13:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2020-10-15 00:13:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:13:48,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:48,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:48,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:13:48,826 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash -282455075, now seen corresponding path program 2 times [2020-10-15 00:13:48,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:48,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620440073] [2020-10-15 00:13:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:49,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:50,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:51,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:51,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:53,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:53,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:13:53,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:13:53,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:13:53,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:53,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:13:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:13:53,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:13:53,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:54,451 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2020-10-15 00:13:54,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:13:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:54,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:54,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:13:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:13:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:13:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:13:54,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:13:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:13:54,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620440073] [2020-10-15 00:13:54,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:13:54,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:13:54,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084582807] [2020-10-15 00:13:54,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:13:54,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:13:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:13:54,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:13:54,543 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand 13 states. [2020-10-15 00:13:56,094 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-10-15 00:13:56,305 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-15 00:13:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:13:56,565 INFO L93 Difference]: Finished difference Result 385 states and 495 transitions. [2020-10-15 00:13:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:13:56,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-15 00:13:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:13:56,570 INFO L225 Difference]: With dead ends: 385 [2020-10-15 00:13:56,570 INFO L226 Difference]: Without dead ends: 316 [2020-10-15 00:13:56,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:13:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-15 00:13:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 202. [2020-10-15 00:13:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-15 00:13:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 263 transitions. [2020-10-15 00:13:56,702 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 263 transitions. Word has length 47 [2020-10-15 00:13:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:13:56,702 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 263 transitions. [2020-10-15 00:13:56,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:13:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 263 transitions. [2020-10-15 00:13:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-15 00:13:56,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:13:56,704 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:13:56,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:13:56,705 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:13:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:13:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash -141906465, now seen corresponding path program 1 times [2020-10-15 00:13:56,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:13:56,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821480295] [2020-10-15 00:13:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:13:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:13:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:56,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:56,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:56,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:57,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:13:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:00,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:01,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:01,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-15 00:14:01,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:14:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:14:01,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:01,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:14:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:14:01,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:14:01,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:02,102 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 39 [2020-10-15 00:14:02,484 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 59 [2020-10-15 00:14:02,851 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-15 00:14:03,028 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 24 [2020-10-15 00:14:03,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:14:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:14:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:14:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:14:03,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:14:03,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 00:14:03,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821480295] [2020-10-15 00:14:03,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:14:03,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:14:03,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882072531] [2020-10-15 00:14:03,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:14:03,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:14:03,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:14:03,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:14:03,313 INFO L87 Difference]: Start difference. First operand 202 states and 263 transitions. Second operand 15 states. [2020-10-15 00:14:03,662 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-15 00:14:03,849 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-15 00:14:04,074 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2020-10-15 00:14:04,326 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-15 00:14:04,473 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-15 00:14:08,846 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-15 00:14:09,485 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-15 00:14:14,139 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-15 00:14:14,490 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2020-10-15 00:14:14,655 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-15 00:14:17,099 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2020-10-15 00:14:17,926 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-15 00:14:18,307 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-15 00:14:18,514 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-15 00:14:18,687 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-15 00:14:18,937 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-15 00:14:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:14:19,127 INFO L93 Difference]: Finished difference Result 616 states and 814 transitions. [2020-10-15 00:14:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:14:19,128 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-15 00:14:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:14:19,133 INFO L225 Difference]: With dead ends: 616 [2020-10-15 00:14:19,134 INFO L226 Difference]: Without dead ends: 474 [2020-10-15 00:14:19,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:14:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-15 00:14:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 309. [2020-10-15 00:14:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-15 00:14:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 396 transitions. [2020-10-15 00:14:19,291 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 396 transitions. Word has length 47 [2020-10-15 00:14:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:14:19,293 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 396 transitions. [2020-10-15 00:14:19,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:14:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 396 transitions. [2020-10-15 00:14:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:14:19,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:14:19,295 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:14:19,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:14:19,295 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:14:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:14:19,295 INFO L82 PathProgramCache]: Analyzing trace with hash -991111783, now seen corresponding path program 3 times [2020-10-15 00:14:19,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:14:19,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13584941] [2020-10-15 00:14:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:14:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:14:19,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:21,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:24,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:24,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:24,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:14:24,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:14:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:14:24,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:24,691 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-15 00:14:24,914 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-15 00:14:25,290 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 68 [2020-10-15 00:14:25,448 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2020-10-15 00:14:25,584 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-15 00:14:25,910 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-10-15 00:14:26,285 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 76 [2020-10-15 00:14:27,543 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 368 DAG size of output: 99 [2020-10-15 00:14:27,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:14:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:14:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:27,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:14:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:14:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:14:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-15 00:14:27,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13584941] [2020-10-15 00:14:27,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:14:27,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:14:27,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024972057] [2020-10-15 00:14:27,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:14:27,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:14:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:14:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:14:27,635 INFO L87 Difference]: Start difference. First operand 309 states and 396 transitions. Second operand 13 states. [2020-10-15 00:14:28,056 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-15 00:14:28,333 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2020-10-15 00:14:28,635 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2020-10-15 00:14:29,160 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-15 00:14:29,552 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 116 [2020-10-15 00:14:29,929 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 104 [2020-10-15 00:14:30,331 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 102 [2020-10-15 00:14:30,726 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 106 [2020-10-15 00:14:31,115 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 99 [2020-10-15 00:14:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:14:31,346 INFO L93 Difference]: Finished difference Result 623 states and 786 transitions. [2020-10-15 00:14:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:14:31,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-15 00:14:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:14:31,350 INFO L225 Difference]: With dead ends: 623 [2020-10-15 00:14:31,350 INFO L226 Difference]: Without dead ends: 512 [2020-10-15 00:14:31,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:14:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-10-15 00:14:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 310. [2020-10-15 00:14:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-15 00:14:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 392 transitions. [2020-10-15 00:14:31,470 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 392 transitions. Word has length 53 [2020-10-15 00:14:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:14:31,470 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 392 transitions. [2020-10-15 00:14:31,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:14:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 392 transitions. [2020-10-15 00:14:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-15 00:14:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:14:31,472 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:14:31,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:14:31,472 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:14:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:14:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2097656927, now seen corresponding path program 2 times [2020-10-15 00:14:31,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:14:31,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930029955] [2020-10-15 00:14:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:14:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:14:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:31,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:32,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:36,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:36,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 00:14:36,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:14:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:14:36,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:36,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:14:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:14:36,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:14:36,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:37,026 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 50 [2020-10-15 00:14:37,501 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 51 [2020-10-15 00:14:37,866 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 39 [2020-10-15 00:14:40,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:14:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:14:40,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:14:40,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:14:40,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:14:40,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:14:40,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:14:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-15 00:14:40,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930029955] [2020-10-15 00:14:40,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:14:40,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:14:40,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821055749] [2020-10-15 00:14:40,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:14:40,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:14:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:14:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=226, Unknown=1, NotChecked=0, Total=272 [2020-10-15 00:14:40,279 INFO L87 Difference]: Start difference. First operand 310 states and 392 transitions. Second operand 17 states. [2020-10-15 00:14:40,755 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-15 00:14:40,941 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-15 00:14:41,191 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-15 00:14:41,355 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-15 00:14:41,657 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-15 00:14:42,079 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-15 00:14:42,584 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-15 00:14:42,991 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-15 00:14:52,284 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-15 00:14:58,691 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2020-10-15 00:15:03,516 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2020-10-15 00:15:08,204 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-15 00:15:10,545 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-15 00:15:11,120 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-15 00:15:11,530 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-15 00:15:11,713 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-15 00:15:12,141 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-15 00:15:12,401 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-10-15 00:15:12,636 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-10-15 00:15:13,263 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2020-10-15 00:15:13,695 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2020-10-15 00:15:14,034 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-10-15 00:15:14,241 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-15 00:15:14,698 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-15 00:15:17,138 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-15 00:15:17,496 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-15 00:15:17,898 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-15 00:15:18,201 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-15 00:15:18,464 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-15 00:15:18,869 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-15 00:15:19,370 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-15 00:15:21,836 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-15 00:15:22,130 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-15 00:15:22,403 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-10-15 00:15:22,625 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-15 00:15:27,203 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-15 00:15:27,516 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-15 00:15:27,722 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-15 00:15:27,994 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-15 00:15:32,615 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-15 00:15:33,221 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-15 00:15:33,714 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-15 00:15:34,063 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-15 00:15:34,665 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-15 00:15:34,891 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-15 00:15:39,352 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-15 00:15:39,583 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-15 00:15:42,047 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-10-15 00:15:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:15:44,514 INFO L93 Difference]: Finished difference Result 1160 states and 1544 transitions. [2020-10-15 00:15:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-15 00:15:44,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-15 00:15:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:15:44,520 INFO L225 Difference]: With dead ends: 1160 [2020-10-15 00:15:44,520 INFO L226 Difference]: Without dead ends: 913 [2020-10-15 00:15:44,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=1933, Invalid=8775, Unknown=4, NotChecked=0, Total=10712 [2020-10-15 00:15:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-10-15 00:15:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 494. [2020-10-15 00:15:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-15 00:15:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 625 transitions. [2020-10-15 00:15:44,712 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 625 transitions. Word has length 53 [2020-10-15 00:15:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:15:44,712 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 625 transitions. [2020-10-15 00:15:44,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:15:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 625 transitions. [2020-10-15 00:15:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:15:44,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:15:44,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:15:44,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:15:44,715 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:15:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:15:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1841816728, now seen corresponding path program 3 times [2020-10-15 00:15:44,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:15:44,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228345005] [2020-10-15 00:15:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:15:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:15:44,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:44,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:44,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:44,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:46,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:46,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:49,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:15:49,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 00:15:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:15:50,089 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-15 00:15:50,266 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-15 00:15:50,449 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-15 00:15:51,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:15:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:15:51,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:15:51,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:15:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:15:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:15:51,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:15:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:15:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 44 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-15 00:15:51,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228345005] [2020-10-15 00:15:51,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:15:51,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:15:51,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173443925] [2020-10-15 00:15:51,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:15:51,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:15:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:15:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:15:51,959 INFO L87 Difference]: Start difference. First operand 494 states and 625 transitions. Second operand 19 states. [2020-10-15 00:15:57,238 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-10-15 00:16:02,953 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-15 00:16:05,445 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-10-15 00:16:08,094 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-15 00:16:08,454 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-15 00:16:10,791 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-15 00:16:12,866 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-15 00:16:14,256 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-15 00:16:19,217 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-15 00:16:20,299 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-15 00:16:20,624 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-15 00:16:29,249 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-15 00:16:33,774 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 57 DAG size of output: 46